Archive
Ephemeris: 05/30/2025 – Ending orbit 50, looking ahead to the 1st month of orbit 51
This is Bob Moler with Ephemeris for Friday, May 30th, the last program of Ephemeris’ 50th orbit of the Sun. Today the Sun will be up for 15 hours and 18 minutes, setting at 9:19, and it will rise tomorrow at 6:00. The Moon, 3 days before first quarter, will set at 1:17 tomorrow morning.
Let’s take a look at June skies. There will be a lot of sunshine this month. The daylight hours will increase a bit from 15 hours and 21 minutes today to 15 hours and 34 minutes on the 21st, retreating back to 15 hours 31 minutes at month’s end. At this time of the year the sunset times for Ludington, Interlochen, Petoskey and Mackinaw City are very nearly the same. However, the sunrise times are at their most divergent. With Ludington’s sunrise being 14 minutes later than Mackinaw City’s. The altitude of the Sun above the southern horizon at local noon (1:44 pm in Interlochen) on the solstice, June 20th will be 68 and three-quarters degrees. Summer will start at 10:42 PM that night.
The astronomical event times given in this blog are for the Traverse City/Interlochen area of Michigan (Lat 44.7° N, Long 85.7° W; EDT, UT – 4 hours) unless stated otherwise. Times will be different for other locations.
Addendum
June Evening Star Chart
The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 4 a.m. for the morning chart. These are the chart times. Note that Interlochen/Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.
Note, the chart times of 11 p.m. and 4 a.m. are for the 15th. For each week before the 15th, add ½ hour (28 minutes if you’re picky). For each week after the 15th, subtract ½ hour, or 28 minutes. The planet positions are updated each Wednesday on this blog. For planet positions on dates other than the 15th, check the Wednesday planet posts on this blog for weekly positions.
June Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Leaky dipper drips on Leo
- Follow the arc of the handle of the Big Dipper to the star Arcturus, and
- Extend like a spike to Spica,
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2025-06-01 | 3h39m | 4h38m | 22h47m | 23h46m | 1h45m | 3h39m | 0.41 |
| 2025-06-02 | 3h38m | 4h37m | 22h48m | 23h48m | 2h07m | 3h38m | 0.51 |
| 2025-06-03 | 3h37m | 4h37m | 22h49m | 23h49m | 2h26m | 3h37m | 0.60 |
| 2025-06-04 | 3h36m | 4h36m | 22h50m | 23h51m | 2h42m | 3h36m | 0.70 |
| 2025-06-05 | 3h35m | 4h35m | 22h51m | 23h52m | 2h58m | 3h35m | 0.78 |
| 2025-06-06 | 3h34m | 4h35m | 22h52m | 23h53m | 3h14m | 3h34m | 0.85 |
| 2025-06-07 | 3h33m | 4h34m | 22h53m | 23h55m | 3h33m | 3h33m | 0.91 |
| 2025-06-08 | 3h32m | 4h34m | 22h54m | 23h56m | – | – | 0.96 |
| 2025-06-09 | 3h31m | 4h33m | 22h55m | 23h57m | – | – | 0.99 |
| 2025-06-10 | 3h30m | 4h33m | 22h55m | 23h58m | – | – | 1.00 |
| 2025-06-11 | 3h30m | 4h33m | 22h56m | 23h59m | – | – | 0.99 |
| 2025-06-12 | 3h29m | 4h32m | 22h57m | 0h00m | – | – | 0.96 |
| 2025-06-13 | 3h29m | 4h32m | 22h58m | 0h01m | – | – | 0.92 |
| 2025-06-14 | 3h28m | 4h32m | 22h58m | 0h02m | – | – | 0.85 |
| 2025-06-15 | 3h28m | 4h32m | 22h59m | 0h03m | 0h03m | 0h30m | 0.77 |
| 2025-06-16 | 3h28m | 4h32m | 22h59m | 0h03m | 0h03m | 0h55m | 0.68 |
| 2025-06-17 | 3h28m | 4h32m | 23h00m | 0h04m | 0h04m | 1h17m | 0.57 |
| 2025-06-18 | 3h28m | 4h32m | 23h00m | 0h04m | 0h04m | 1h36m | 0.46 |
| 2025-06-19 | 3h28m | 4h32m | 23h00m | 0h05m | 0h05m | 1h56m | 0.34 |
| 2025-06-20 | 3h28m | 4h32m | 23h00m | 0h05m | 0h05m | 2h16m | 0.24 |
| 2025-06-21 | 3h28m | 4h32m | 23h01m | 0h05m | 0h05m | 2h39m | 0.14 |
| 2025-06-22 | 3h28m | 4h33m | 23h01m | 0h05m | 0h05m | 3h07m | 0.07 |
| 2025-06-23 | 3h29m | 4h33m | 23h01m | 0h05m | 0h05m | 3h29m | 0.02 |
| 2025-06-24 | 3h29m | 4h33m | 23h01m | 0h05m | 0h05m | 3h29m | 0.00 |
| 2025-06-25 | 3h30m | 4h34m | 23h01m | 0h05m | 0h05m | 3h30m | 0.01 |
| 2025-06-26 | 3h30m | 4h34m | 23h01m | 0h05m | 0h05m | 3h30m | 0.04 |
| 2025-06-27 | 3h31m | 4h35m | 23h01m | 0h05m | 0h05m | 3h31m | 0.10 |
| 2025-06-28 | 3h32m | 4h35m | 23h01m | 0h04m | 0h04m | 3h32m | 0.17 |
| 2025-06-29 | 3h33m | 4h36m | 23h00m | 0h04m | 0h09m | 3h33m | 0.26 |
| 2025-06-30 | 3h34m | 4h37m | 23h00m | 0h03m | 0h29m | 3h34m | 0.35 |
The twilight calendar was generated using Cartes du Ciel (Sky Charts), with some modifications. See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
Jun 1 Su Venus: 45.9° W
1 Su 5:49 AM Moon-Mars: 1.5° S
1 Su 9:30 PM Moon-Regulus: 1.9° S
2 Mo 11:41 PM First Quarter
3 Tu 9:33 PM Moon Descending Node
6 Fr 10:15 AM Moon-Spica: 0.6° N
7 Sa 6:42 AM Moon Apogee: 405600 km
10 Tu 6:25 AM Moon-Antares: 0.3° N
11 We 3:44 AM Full Moon
11 We 7:54 PM Moon South Dec.: 28.4° S
16 Mo 10:05 PM Mars-Regulus: 0.7° N
18 We 5:41 AM Moon Ascending Node
18 We 3:19 PM Last Quarter
18 We 11:47 PM Moon-Saturn: 3.4° S
20 Fr 10:42 PM Summer Solstice
21 Sa 3:51 PM Mercury-Pollux: 5° S
22 Su 10:59 PM Moon-Pleiades: 0.6° S
23 Mo 12:43 AM Moon Perigee: 363200 km
24 Tu 11:06 AM Jupiter Conjunction
24 Tu 9:43 PM Moon North Dec.: 28.4° N
25 We 6:31 AM New Moon
27 Fr 2:02 AM Moon-Mercury: 2.9° S
27 Fr 1:42 PM Moon-Beehive: 2.1° S
29 Su 6:26 AM Moon-Regulus: 1.6° S
29 Su 9:05 PM Moon-Mars: 0.2° S
30 Mo 11:46 PM Moon Descending Node
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/Traverse City, MI
June, 2025 Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun 1| 06:00a 09:21p 15:21 | 10:45p 04:37a | Set 02:07a 38%|
|Mon 2| 05:59a 09:22p 15:22 | 10:46p 04:36a |F Qtr Set 02:25a 48%|
|Tue 3| 05:59a 09:23p 15:23 | 10:47p 04:35a | Set 02:41a 58%|
|Wed 4| 05:58a 09:23p 15:25 | 10:48p 04:34a | Set 02:57a 68%|
|Thu 5| 05:58a 09:24p 15:26 | 10:49p 04:34a | Set 03:14a 76%|
|Fri 6| 05:58a 09:25p 15:27 | 10:50p 04:33a | Set 03:32a 84%|
|Sat 7| 05:57a 09:26p 15:28 | 10:51p 04:33a | Set 03:53a 90%|
+------+-----------------------+----------------+-----------------------+
|Sun 8| 05:57a 09:26p 15:29 | 10:51p 04:32a | Set 04:20a 95%|
|Mon 9| 05:57a 09:27p 15:30 | 10:52p 04:32a | Set 04:53a 98%|
|Tue 10| 05:57a 09:27p 15:30 | 10:53p 04:31a | Set 05:36a 100%|
|Wed 11| 05:56a 09:28p 15:31 | 10:54p 04:31a |Full Rise 10:31p 99%|
|Thu 12| 05:56a 09:29p 15:32 | 10:54p 04:31a | Rise 11:20p 97%|
|Fri 13| 05:56a 09:29p 15:32 | 10:55p 04:30a | Rise 11:59p 93%|
|Sat 14| 05:56a 09:29p 15:33 | 10:55p 04:30a | Rise 12:30a 87%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 05:56a 09:30p 15:33 | 10:56p 04:30a | Rise 12:55a 79%|
|Mon 16| 05:56a 09:30p 15:34 | 10:56p 04:30a | Rise 01:17a 69%|
|Tue 17| 05:56a 09:31p 15:34 | 10:57p 04:30a | Rise 01:36a 59%|
|Wed 18| 05:56a 09:31p 15:34 | 10:57p 04:30a |L Qtr Rise 01:55a 48%|
|Thu 19| 05:56a 09:31p 15:34 | 10:58p 04:30a | Rise 02:15a 37%|
|Fri 20| 05:57a 09:31p 15:34 | 10:58p 04:30a | Rise 02:38a 26%|
|Sat 21| 05:57a 09:32p 15:34 | 10:58p 04:30a | Rise 03:07a 16%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 05:57a 09:32p 15:34 | 10:58p 04:31a | Rise 03:44a 9%|
|Mon 23| 05:57a 09:32p 15:34 | 10:58p 04:31a | Rise 04:33a 3%|
|Tue 24| 05:58a 09:32p 15:34 | 10:58p 04:31a | Rise 05:36a 0%|
|Wed 25| 05:58a 09:32p 15:34 | 10:58p 04:32a |New Set 10:28p 1%|
|Thu 26| 05:58a 09:32p 15:33 | 10:58p 04:32a | Set 11:12p 3%|
|Fri 27| 05:59a 09:32p 15:33 | 10:58p 04:33a | Set 11:44p 8%|
|Sat 28| 05:59a 09:32p 15:32 | 10:58p 04:33a | Set 12:08a 15%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 06:00a 09:32p 15:32 | 10:57p 04:34a | Set 12:28a 24%|
|Mon 30| 06:00a 09:32p 15:31 | 10:57p 04:35a | Set 12:46a 33%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS app.
Ephemeris: 05/01/2025 – Previewing May Skies
This is Ephemeris for Thursday, May 1st. Today the Sun will be up for 14 hours and 15 minutes, setting at 8:48, and it will rise tomorrow at 6:30. The Moon, 3 days before first quarter, will set at 2:05 tomorrow morning.
May is here, when the promise made on Groundhog Day is finally fulfilled. Daylight hours in the Interlochen/Traverse City area will increase from 14 hours and 15 minutes today to 15 hours 20 minutes on the 31st. The altitude, or angle, of the Sun above the southern horizon at local noon will ascend from 61 degrees now to 67 degrees at month’s end. The altitude of the Sun in the Straits area will be a degree lower than that, but your daylight hours will be a few minutes longer. Local apparent noon this month, when the Sun passes due south, will be about 1:38 p.m. This is the month of the Eta Aquariid meteor shower which will reach its peak next week Tuesday morning. There will be less than an hour of prime viewing after the Moon sets at 4:03 AM.
The astronomical event times given in this blog are for the Traverse City/Interlochen area of Michigan (Lat 44.7° N, Long 85.7° W; EDT, UT – 4 hours) unless stated otherwise. Times will be different for other locations.
Addendum
May Evening Star Chart
The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 4 a.m. on the 16th for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.
Note, the chart times of 11 p.m. and 4 a.m. are for the night of the15/16th. For each week before then add ½ hour (28 minutes if you’re picky). For each week after then, subtract ½ hour or 28 minutes. The planet positions are updated each Wednesday on this blog. For planet positions on dates other than the 15th, check the Wednesday planet posts on this blog for their weekly locations.
May Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Leaky dipper drips on Leo
- Follow the arc of the handle of the Big Dipper to the star Arcturus, and
- Extend like a spike to Spica,
- EaqR is the radiant of the Eta Aquariid meteor shower that peaks on the 5th.
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2025-05-01 | 4h36m | 5h21m | 22h02m | 22h47m | 1h09m | 4h36m | 0.26 |
| 2025-05-02 | 4h34m | 5h19m | 22h04m | 22h49m | 2h06m | 4h34m | 0.36 |
| 2025-05-03 | 4h32m | 5h17m | 22h06m | 22h51m | 2h48m | 4h32m | 0.46 |
| 2025-05-04 | 4h30m | 5h16m | 22h07m | 22h53m | 3h19m | 4h30m | 0.57 |
| 2025-05-05 | 4h28m | 5h14m | 22h09m | 22h55m | 3h44m | 4h28m | 0.66 |
| 2025-05-06 | 4h26m | 5h12m | 22h10m | 22h57m | 4h03m | 4h26m | 0.75 |
| 2025-05-07 | 4h24m | 5h11m | 22h12m | 22h59m | 4h20m | 4h24m | 0.83 |
| 2025-05-08 | 4h22m | 5h09m | 22h13m | 23h01m | – | – | 0.89 |
| 2025-05-09 | 4h19m | 5h07m | 22h15m | 23h03m | – | – | 0.94 |
| 2025-05-10 | 4h17m | 5h06m | 22h16m | 23h05m | – | – | 0.98 |
| 2025-05-11 | 4h15m | 5h04m | 22h18m | 23h07m | – | – | 1.00 |
| 2025-05-12 | 4h13m | 5h02m | 22h20m | 23h09m | – | – | 1.00 |
| 2025-05-13 | 4h11m | 5h01m | 22h21m | 23h11m | – | – | 0.98 |
| 2025-05-14 | 4h09m | 4h59m | 22h23m | 23h13m | 23h13m | 23h42m | 0.94 |
| 2025-05-15 | 4h07m | 4h58m | 22h24m | 23h15m | 23h15m | – | 0.89 |
| 2025-05-16 | 4h05m | 4h56m | 22h26m | 23h17m | 23h17m | 0h36m | 0.82 |
| 2025-05-17 | 4h04m | 4h55m | 22h27m | 23h19m | 23h19m | 1h21m | 0.74 |
| 2025-05-18 | 4h02m | 4h54m | 22h29m | 23h21m | 23h21m | 1h58m | 0.64 |
| 2025-05-19 | 4h00m | 4h52m | 22h30m | 23h22m | 23h22m | 2h27m | 0.53 |
| 2025-05-20 | 3h58m | 4h51m | 22h31m | 23h24m | 23h24m | 2h51m | 0.42 |
| 2025-05-21 | 3h56m | 4h50m | 22h33m | 23h26m | 23h26m | 3h12m | 0.31 |
| 2025-05-22 | 3h54m | 4h48m | 22h34m | 23h28m | 23h28m | 3h32m | 0.21 |
| 2025-05-23 | 3h53m | 4h47m | 22h36m | 23h30m | 23h30m | 3h52m | 0.12 |
| 2025-05-24 | 3h51m | 4h46m | 22h37m | 23h32m | 23h32m | 3h51m | 0.05 |
| 2025-05-25 | 3h49m | 4h45m | 22h38m | 23h34m | 23h34m | 3h49m | 0.01 |
| 2025-05-26 | 3h48m | 4h44m | 22h40m | 23h36m | 23h36m | 3h48m | 0.00 |
| 2025-05-27 | 3h46m | 4h43m | 22h41m | 23h37m | 23h37m | 3h46m | 0.02 |
| 2025-05-28 | 3h45m | 4h42m | 22h42m | 23h39m | 23h51m | 3h45m | 0.06 |
| 2025-05-29 | 3h43m | 4h41m | 22h43m | 23h41m | – | 3h43m | 0.13 |
| 2025-05-30 | 3h42m | 4h40m | 22h45m | 23h43m | 0h41m | 3h42m | 0.21 |
| 2025-05-31 | 3h41m | 4h39m | 22h46m | 23h44m | 1h18m | 3h41m | 0.31 |
The twilight calendar was generated using Cartes du Ciel (Sky Charts), with some corrections.
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
May 1 Th Venus: 40.9° W
1 Th 2:35 AM Moon North Dec.: 28.6° N
2 Fr 8:02 PM Moon-Pollux: 2.2° N
3 Sa 7:12 PM Moon-Mars: 2.2° S
3 Sa 7:27 PM Moon-Beehive: 2.6° S
4 Su 7:59 AM Mars-Beehive: 0.4° N
4 Su 9:52 AM First Quarter
4 Su 10:07 PM Eta Aquariid Shower: ZHR = 60
5 Mo 1:58 PM Moon-Regulus: 2.2° S
7 We 7:44 PM Moon Descending Node
10 Sa 3:43 AM Moon-Spica: 0.4° N
10 Sa 8:49 PM Moon Apogee: 406200 km
12 Mo 12:56 PM Full Moon
14 We 12:10 AM Moon-Antares: 0.3° N
15 Th 2:44 PM Moon South Dec.: 28.5° S
17 Sa 8:55 PM Uranus Conjunction
20 Tu 7:59 AM Last Quarter
22 Th 4:05 AM Moon Ascending Node
22 Th 1:51 PM Moon-Saturn: 2.8° S
23 Fr 7:52 PM Moon-Venus: 4° S
25 Su 9:37 PM Moon Perigee: 359000 km
26 Mo 11:02 PM New Moon
28 We 12:16 PM Moon North Dec.: 28.4° N
30 Fr 12:07 AM Mercury Superior Conjunction
30 Fr 5:13 AM Moon-Pollux: 2.4° N
31 Sa 4:00 AM Moon-Beehive: 2.3° S
31 Sa 9:59 PM Venus Elongation: 45.9° W
Jun 1 Su Venus: 45.9° W
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
May, 2025 Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Thu 1| 06:32a 08:48p 14:15 | 10:00p 05:20a | Set 02:05a 24%|
|Fri 2| 06:30a 08:49p 14:18 | 10:02p 05:18a | Set 02:47a 34%|
|Sat 3| 06:29a 08:50p 14:21 | 10:03p 05:16a | Set 03:19a 44%|
+------+-----------------------+----------------+-----------------------+
|Sun 4| 06:28a 08:51p 14:23 | 10:05p 05:14a |F Qtr Set 03:43a 54%|
|Mon 5| 06:26a 08:53p 14:26 | 10:06p 05:13a | Set 04:03a 64%|
|Tue 6| 06:25a 08:54p 14:28 | 10:08p 05:11a | Set 04:20a 73%|
|Wed 7| 06:23a 08:55p 14:31 | 10:10p 05:09a | Set 04:36a 81%|
|Thu 8| 06:22a 08:56p 14:33 | 10:11p 05:08a | Set 04:51a 88%|
|Fri 9| 06:21a 08:57p 14:36 | 10:13p 05:06a | Set 05:08a 94%|
|Sat 10| 06:20a 08:59p 14:38 | 10:14p 05:04a | Set 05:27a 97%|
+------+-----------------------+----------------+-----------------------+
|Sun 11| 06:18a 09:00p 14:41 | 10:16p 05:03a | Set 05:50a 99%|
|Mon 12| 06:17a 09:01p 14:43 | 10:17p 05:01a |Full Rise 09:34p 100%|
|Tue 13| 06:16a 09:02p 14:45 | 10:19p 05:00a | Rise 10:39p 98%|
|Wed 14| 06:15a 09:03p 14:48 | 10:20p 04:58a | Rise 11:41p 95%|
|Thu 15| 06:14a 09:04p 14:50 | 10:22p 04:57a | Rise 12:36a 90%|
|Fri 16| 06:13a 09:05p 14:52 | 10:23p 04:55a | Rise 01:21a 83%|
|Sat 17| 06:12a 09:06p 14:54 | 10:25p 04:54a | Rise 01:57a 75%|
+------+-----------------------+----------------+-----------------------+
|Sun 18| 06:11a 09:08p 14:57 | 10:26p 04:52a | Rise 02:27a 66%|
|Mon 19| 06:10a 09:09p 14:59 | 10:28p 04:51a | Rise 02:51a 55%|
|Tue 20| 06:09a 09:10p 15:01 | 10:29p 04:50a |L Qtr Rise 03:12a 45%|
|Wed 21| 06:08a 09:11p 15:03 | 10:31p 04:48a | Rise 03:32a 34%|
|Thu 22| 06:07a 09:12p 15:05 | 10:32p 04:47a | Rise 03:51a 23%|
|Fri 23| 06:06a 09:13p 15:06 | 10:33p 04:46a | Rise 04:13a 14%|
|Sat 24| 06:05a 09:14p 15:08 | 10:35p 04:45a | Rise 04:39a 7%|
+------+-----------------------+----------------+-----------------------+
|Sun 25| 06:04a 09:15p 15:10 | 10:36p 04:44a | Rise 05:12a 2%|
|Mon 26| 06:04a 09:16p 15:12 | 10:37p 04:42a |New Set 09:25p 0%|
|Tue 27| 06:03a 09:17p 15:13 | 10:39p 04:41a | Set 10:44p 1%|
|Wed 28| 06:02a 09:18p 15:15 | 10:40p 04:40a | Set 11:50p 5%|
|Thu 29| 06:01a 09:19p 15:17 | 10:41p 04:39a | Set 12:40a 11%|
|Fri 30| 06:01a 09:19p 15:18 | 10:42p 04:38a | Set 01:17a 19%|
|Sat 31| 06:00a 09:20p 15:20 | 10:43p 04:37a | Set 01:45a 29%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Created using my LookingUp for DOS app.
Ephemeris: 04/01/2025 – Previewing April 2025 skies
This is Ephemeris for April Fools’ Day, Tuesday, April 1st. Today the Sun will be up for 12 hours and 47 minutes, setting at 8:10, and it will rise tomorrow at 7:21. The Moon, halfway from new to first quarter, will set at 1:03 tomorrow morning.
The second quarter of the year begins today. Daylight hours in the Interlochen/Traverse City area and will increase from 12 hours and 47 minutes today to 14 hours 13 minutes on the 30th as spring really takes hold. The altitude, or angle, of the sun above the southern horizon at local noon will be 50 degrees today and will ascend to 60 degrees on April 3 The altitude of the Sun in the Straits area will be a degree lower. The actual time of local apparent noon at mid-month for the Interlochen/Traverse City area, when the sun passes due south, will be about 1:42 p.m. Jupiter and Mars will still be our evening planets this month. The Pleiades, tonight, will be just below the crescent Moon.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). Times will be different for other locations.
Addendum
April Evening Star Chart
The planets and stars are plotted for the 15th at 10 PM EST in the evening and 5 AM for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere (rotating star finder) you may have to set it to 45 minutes or one hour 45 minutes (Daylight Time) earlier than the current time.
Note the chart times of 10 PM and 6 AM are for the 15th and 16th. For each week before these dates, add ½ hour (28 minutes if you’re picky). For each week after, subtract ½ hour. Planet positions on dates other than the 15/16th can be found in the Wednesday planet posts on this blog.
April Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- The leaky bowl of the Big Dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus, then
- Follow the spike to Spica.
- The Summer Triangle appears in red.
- LyrR is the radiant of the Lyrid meteor shower, which will reach peak on the morning of the 22nd.
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2025-04-01 | 5h42m | 6h19m | 21h18m | 21h54m | – | 5h42m | 0.20 |
| 2025-04-02 | 5h40m | 6h17m | 21h19m | 21h56m | 1h03m | 5h40m | 0.30 |
| 2025-04-03 | 5h38m | 6h15m | 21h21m | 21h57m | 2h20m | 5h38m | 0.40 |
| 2025-04-04 | 5h36m | 6h13m | 21h22m | 21h59m | 3h23m | 5h36m | 0.51 |
| 2025-04-05 | 5h34m | 6h11m | 21h23m | 22h01m | 4h12m | 5h34m | 0.62 |
| 2025-04-06 | 5h32m | 6h09m | 21h25m | 22h02m | 4h49m | 5h32m | 0.71 |
| 2025-04-07 | 5h29m | 6h07m | 21h26m | 22h04m | 5h17m | 5h29m | 0.80 |
| 2025-04-08 | 5h27m | 6h05m | 21h28m | 22h06m | – | – | 0.87 |
| 2025-04-09 | 5h25m | 6h03m | 21h29m | 22h07m | – | – | 0.93 |
| 2025-04-10 | 5h23m | 6h01m | 21h31m | 22h09m | – | – | 0.97 |
| 2025-04-11 | 5h21m | 5h59m | 21h32m | 22h11m | – | – | 0.99 |
| 2025-04-12 | 5h18m | 5h57m | 21h34m | 22h12m | – | – | 1.00 |
| 2025-04-13 | 5h16m | 5h55m | 21h35m | 22h14m | – | – | 0.99 |
| 2025-04-14 | 5h14m | 5h53m | 21h36m | 22h16m | 22h16m | 22h37m | 0.96 |
| 2025-04-15 | 5h12m | 5h51m | 21h38m | 22h17m | 22h17m | 23h43m | 0.91 |
| 2025-04-16 | 5h09m | 5h49m | 21h39m | 22h19m | 22h19m | – | 0.85 |
| 2025-04-17 | 5h07m | 5h47m | 21h41m | 22h21m | 22h21m | 0h48m | 0.78 |
| 2025-04-18 | 5h05m | 5h45m | 21h42m | 22h23m | 22h23m | 1h48m | 0.69 |
| 2025-04-19 | 5h03m | 5h43m | 21h44m | 22h25m | 22h25m | 2h40m | 0.59 |
| 2025-04-20 | 5h01m | 5h41m | 21h45m | 22h26m | 22h26m | 3h23m | 0.49 |
| 2025-04-21 | 4h58m | 5h39m | 21h47m | 22h28m | 22h28m | 3h57m | 0.38 |
| 2025-04-22 | 4h56m | 5h38m | 21h49m | 22h30m | 22h30m | 4h25m | 0.28 |
| 2025-04-23 | 4h54m | 5h36m | 21h50m | 22h32m | 22h32m | 4h48m | 0.18 |
| 2025-04-24 | 4h52m | 5h34m | 21h52m | 22h34m | 22h34m | 4h52m | 0.10 |
| 2025-04-25 | 4h50m | 5h32m | 21h53m | 22h36m | 22h36m | 4h50m | 0.04 |
| 2025-04-26 | 4h47m | 5h30m | 21h55m | 22h37m | 22h37m | 4h47m | 0.01 |
| 2025-04-27 | 4h45m | 5h28m | 21h56m | 22h39m | 22h39m | 4h45m | 0.00 |
| 2025-04-28 | 4h43m | 5h26m | 21h58m | 22h41m | 22h41m | 4h43m | 0.03 |
| 2025-04-29 | 4h41m | 5h25m | 21h59m | 22h43m | 23h56m | 4h41m | 0.09 |
| 2025-04-30 | 4h39m | 5h23m | 22h01m | 22h45m | – | 4h39m | 0.16 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
Apr 1 Tu Venus: 16.3° W
1 Tu 4:28 PM Moon-Pleiades: 0.6° S
3 Th 6:15 PM Moon North Dec.: 28.7° N
4 Fr 10:14 PM First Quarter
5 Sa 12:46 PM Moon-Pollux: 2.1° N
5 Sa 3:04 PM Moon-Mars: 2.3° S
6 Su 12:44 PM Moon-Beehive: 2.8° S
8 Tu 7:51 AM Moon-Regulus: 2.4° S
10 Th 8:19 AM Mercury-Saturn: 2.1° N
10 Th 3:56 PM Moon Descending Node
12 Sa 8:22 PM Full Moon
12 Sa 9:39 PM Moon-Spica: 0.4° N
13 Su 6:48 PM Moon Apogee: 406300 km
16 We 6:19 PM Moon-Antares: 0.4° N
18 Fr 9:24 AM Moon South Dec.: 28.6° S
20 Su 9:35 PM Last Quarter
21 Mo 2:59 PM Mercury Elongation: 27.4° W
22 Tu 8:53 AM Lyrid Shower: ZHR = 20
24 Th 9:21 PM Moon-Venus: 2.4° N
24 Th 10:23 PM Moon Ascending Node
25 Fr 12:15 AM Moon-Saturn: 2.3° S
25 Fr 9:05 PM Moon-Mercury: 4.3° S
27 Su 12:15 PM Moon Perigee: 357100 km
27 Su 3:31 PM New Moon
28 Mo 3:27 PM Venus-Saturn: 3.7° N
29 Tu 2:35 AM Moon-Pleiades: 0.5° S
May 1 Th Venus: 40.9° W
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
April, 2025 Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Tue 1| 07:23a 08:10p 12:47 | 09:15p 06:18a | Set 01:03a 18%|
|Wed 2| 07:21a 08:12p 12:50 | 09:17p 06:16a | Set 02:19a 27%|
|Thu 3| 07:19a 08:13p 12:53 | 09:18p 06:14a | Set 03:23a 38%|
|Fri 4| 07:17a 08:14p 12:57 | 09:19p 06:12a |F Qtr Set 04:12a 49%|
|Sat 5| 07:15a 08:15p 13:00 | 09:21p 06:10a | Set 04:48a 60%|
+------+-----------------------+----------------+-----------------------+
|Sun 6| 07:13a 08:17p 13:03 | 09:22p 06:08a | Set 05:16a 69%|
|Mon 7| 07:12a 08:18p 13:06 | 09:24p 06:06a | Set 05:38a 78%|
|Tue 8| 07:10a 08:19p 13:09 | 09:25p 06:04a | Set 05:57a 86%|
|Wed 9| 07:08a 08:20p 13:12 | 09:27p 06:02a | Set 06:13a 92%|
|Thu 10| 07:06a 08:22p 13:15 | 09:28p 06:00a | Set 06:29a 96%|
|Fri 11| 07:04a 08:23p 13:18 | 09:30p 05:58a | Set 06:44a 99%|
|Sat 12| 07:03a 08:24p 13:21 | 09:31p 05:56a |Full Rise 08:25p 100%|
+------+-----------------------+----------------+-----------------------+
|Sun 13| 07:01a 08:25p 13:24 | 09:33p 05:54a | Rise 09:30p 99%|
|Mon 14| 06:59a 08:27p 13:27 | 09:34p 05:52a | Rise 10:36p 96%|
|Tue 15| 06:57a 08:28p 13:30 | 09:35p 05:50a | Rise 11:43p 92%|
|Wed 16| 06:56a 08:29p 13:33 | 09:37p 05:48a | Rise 12:48a 86%|
|Thu 17| 06:54a 08:30p 13:36 | 09:39p 05:46a | Rise 01:48a 79%|
|Fri 18| 06:52a 08:32p 13:39 | 09:40p 05:44a | Rise 02:40a 70%|
|Sat 19| 06:51a 08:33p 13:42 | 09:42p 05:42a | Rise 03:22a 61%|
+------+-----------------------+----------------+-----------------------+
|Sun 20| 06:49a 08:34p 13:45 | 09:43p 05:40a |L Qtr Rise 03:57a 51%|
|Mon 21| 06:47a 08:35p 13:47 | 09:45p 05:38a | Rise 04:25a 40%|
|Tue 22| 06:46a 08:37p 13:50 | 09:46p 05:36a | Rise 04:48a 30%|
|Wed 23| 06:44a 08:38p 13:53 | 09:48p 05:35a | Rise 05:09a 20%|
|Thu 24| 06:43a 08:39p 13:56 | 09:49p 05:33a | Rise 05:29a 11%|
|Fri 25| 06:41a 08:40p 13:59 | 09:51p 05:31a | Rise 05:50a 5%|
|Sat 26| 06:39a 08:42p 14:02 | 09:52p 05:29a | Rise 06:14a 1%|
+------+-----------------------+----------------+-----------------------+
|Sun 27| 06:38a 08:43p 14:04 | 09:54p 05:27a |New Set 09:05p 0%|
|Mon 28| 06:36a 08:44p 14:07 | 09:55p 05:25a | Set 10:33p 2%|
|Tue 29| 06:35a 08:45p 14:10 | 09:57p 05:23a | Set 11:56p 7%|
|Wed 30| 06:33a 08:46p 14:13 | 09:59p 05:22a | Set 01:08a 15%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS program.
Ephemeris: 02/28/25 – Previewing March Skies
Ephemeris: 02/28/25 – Previewing March Skies
This is Ephemeris for Friday, February 28th. Today the Sun will be up for 11 hours and 8 minutes, setting at 6:29, and it will rise tomorrow at 7:19. The Moon, 1 day past new, will set at 7:34 this evening.
Let’s preview the month of March. In March the increase in daylight hours is at its greatest, with spring 3 weeks away. Daylight hours will increase from 11 hours and 11 minutes tomorrow to 12 hours and 44 minutes on the 31st. Along with that the altitude of the Sun at local noon will increase from 38 degrees tomorrow to 49 ½ degrees at month’s end. Local noon tomorrow, by the way, for Interlochen and Traverse City is 12:54 pm, which is mainly due to the fact that our standard time meridian happens to run through Philadelphia. That’s before daylight time starts on the 9th. On that date local noon will be 1:52 pm. Spring will begin later this month on the 20th when the Sun will pass overhead on the equator heading northward.
We change to Daylight Saving Time on the 9th. EST to EDT. Bah, Humbug!
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). Times will be different for other locations.
Addendum
Addendum
March Evening Star Chart
The planets and stars are plotted for the 15th at 10 p.m. EDT in the evening and 6 a.m. on the 16th for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian. (An hour and 45 minutes behind our Daylight Saving Time meridian during EDT). To duplicate the star positions on a planisphere (rotating star finder) you may have to set it to 45 minutes or 1 hour 45 minutes earlier than your current time.
Note the chart times of 10 PM on the 15th, and 6 AM on the 16th. For each week before then, add ½ hour (28 minutes if you’re picky). For each week after then, subtract ½ hour. For planet positions on dates other than the dateshere, check the Wednesday planet posts on this blog.
March Morning Star Chart
For a list of constellation names to go with the abbreviations click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
- The leaky bowl of the Big Dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus, and
- Extend it as a spike to Spica.
- The Summer Triangle appears in red.
Twilight Limits, Nautical and Astronomical
Omitted due to WordPress issues
NASA Calendar of Planetary Events
Date Time EST Event
Mar 1 Sa Venus: 30.4° E
1 Sa 12:40 AM Moon Ascending Node
1 Sa 4:18 PM Moon Perigee: 362000 km
1 Sa 6:18 PM Moon-Venus: 6.4° N
5 We 7:32 AM Moon-Pleiades: 0.6° S
6 Th 11:32 AM First Quarter
7 Fr 10:56 AM Moon North Dec.: 28.7° N
8 Sa 12:59 AM Mercury Elongation: 18.2° E
8 Sa 7:27 PM Moon-Mars: 1.8° S
EDT
9 Su 6:06 AM Moon-Pollux: 2.1° N
10 Mo 7:10 AM Moon-Beehive: 2.8° S
12 We 2:07 AM Moon-Regulus: 2.4° S
12 We 6:03 AM Saturn Conjunction
12 We 1:52 PM Mercury-Venus: 5.5° N
14 Fr 2:55 AM Full Moon
14 Fr 3:00 AM Total Lunar Eclipse
14 Fr 9:45 AM Moon Descending Node
16 Su 3:16 PM Moon-Spica: 0.4° N
17 Mo 12:37 PM Moon Apogee: 405800 km
19 We 6:20 PM Neptune Conjunction
20 Th 5:02 AM Vernal Equinox
20 Th 11:58 AM Moon-Antares: 0.5° N
22 Sa 2:47 AM Moon South Dec.: 28.7° S
22 Sa 7:29 AM Last Quarter
22 Sa 9:26 PM Venus Inferior Conj.
24 Mo 3:47 PM Mercury Inferior Conj.
28 Fr 12:29 PM Moon Ascending Node
29 Sa 6:48 AM Partial Solar Eclipse
29 Sa 6:58 AM New Moon
29 Sa 3:27 PM Mars-Pollux: 4° S
30 Su 1:26 AM Moon Perigee: 358100 km
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html
If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.
Note that the site is now kept up for archival purposes. Fred Espenak retired from NASA several years ago and has his own site, AstroPixels, which contains much the same information: http://astropixels.com/almanac/almanac.html.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
March, 2025 Local time zone: EST
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sat 1| 07:19a 06:31p 11:11 | 07:34p 06:16a | Set 08:55p 5%|
+------+-----------------------+----------------+-----------------------+
|Sun 2| 07:18a 06:32p 11:14 | 07:35p 06:15a | Set 10:17p 12%|
|Mon 3| 07:16a 06:33p 11:17 | 07:36p 06:13a | Set 11:40p 21%|
|Tue 4| 07:14a 06:35p 11:20 | 07:38p 06:11a | Set 01:02a 31%|
|Wed 5| 07:12a 06:36p 11:23 | 07:39p 06:09a | Set 02:21a 42%|
|Thu 6| 07:10a 06:37p 11:26 | 07:40p 06:08a |F Qtr Set 03:31a 53%|
|Fri 7| 07:09a 06:38p 11:29 | 07:41p 06:06a | Set 04:28a 64%|
|Sat 8| 07:07a 06:40p 11:32 | 07:43p 06:04a | Set 05:12a 74%|
+------+-----------------------+----------------+-----------------------+
| EDT | Time Change | | |
|Sun 9| 08:05a 07:41p 11:36 | 08:44p 07:02a | Set 06:45a 83%|
|Mon 10| 08:03a 07:42p 11:39 | 08:45p 07:00a | Set 07:11a 90%|
|Tue 11| 08:01a 07:44p 11:42 | 08:47p 06:59a | Set 07:32a 95%|
|Wed 12| 08:00a 07:45p 11:45 | 08:48p 06:57a | Set 07:49a 98%|
|Thu 13| 07:58a 07:46p 11:48 | 08:49p 06:55a | Set 08:06a 100%|
|Fri 14| 07:56a 07:48p 11:51 | 08:51p 06:53a |Full Rise 08:27p 100%|
|Sat 15| 07:54a 07:49p 11:54 | 08:52p 06:51a | Rise 09:30p 97%|
+------+-----------------------+----------------+-----------------------+
|Sun 16| 07:52a 07:50p 11:57 | 08:53p 06:49a | Rise 10:35p 93%|
|Mon 17| 07:50a 07:51p 12:01 | 08:55p 06:47a | Rise 11:40p 88%|
|Tue 18| 07:49a 07:53p 12:04 | 08:56p 06:45a | Rise 12:47a 81%|
|Wed 19| 07:47a 07:54p 12:07 | 08:57p 06:43a | Rise 01:53a 73%|
|Thu 20| 07:45a 07:55p 12:10 | 08:59p 06:42a | Rise 02:57a 64%|
|Fri 21| 07:43a 07:56p 12:13 | 09:00p 06:40a | Rise 03:55a 55%|
|Sat 22| 07:41a 07:58p 12:16 | 09:01p 06:38a |L Qtr Rise 04:45a 45%|
+------+-----------------------+----------------+-----------------------+
|Sun 23| 07:39a 07:59p 12:19 | 09:03p 06:36a | Rise 05:25a 35%|
|Mon 24| 07:37a 08:00p 12:22 | 09:04p 06:34a | Rise 05:58a 25%|
|Tue 25| 07:36a 08:02p 12:26 | 09:05p 06:32a | Rise 06:24a 16%|
|Wed 26| 07:34a 08:03p 12:29 | 09:07p 06:30a | Rise 06:47a 9%|
|Thu 27| 07:32a 08:04p 12:32 | 09:08p 06:28a | Rise 07:08a 3%|
|Fri 28| 07:30a 08:05p 12:35 | 09:10p 06:26a | Rise 07:29a 0%|
|Sat 29| 07:28a 08:07p 12:38 | 09:11p 06:24a |New Set 08:48p 0%|
+------+-----------------------+----------------+-----------------------+
|Sun 30| 07:26a 08:08p 12:41 | 09:12p 06:22a | Set 10:13p 4%|
|Mon 31| 07:24a 08:09p 12:44 | 09:14p 06:20a | Set 11:39p 10%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Created using my LookingUp for DOS output as text.
Ephemeris: 01/31/2025 – Previewing February Skies
This is Bob Moler with Ephemeris for Friday, January 31st. Today the Sun will be up for 9 hours and 47 minutes, setting at 5:50, and it will rise tomorrow at 8:01. The Moon, 2 days past new, will set at 8:39 this evening.
January was a wild and crazy month, let’s hope February is short and sweet. Well, at least it’ll be short. The daylight hours throughout the month will be getting longer. Daylight hours will increase from 9 hours and 50 minutes tomorrow to 11 hours and 8 minutes on the 28th. The sunrise time will decrease from 8:01 today to 7:21 at month’s end. The sunset times will increase from 5:51 tomorrow to 6:29 on the 28th. Along with that the altitude of the Sun at noon will increase from 28.4 degrees tomorrow to 37.6 degrees at month’s end. It will be a degree lower for folks in the Straits area because they are a degree of latitude farther north. Local noon, by the way for Interlochen and Traverse City is about 12:56 p.m. The Moon will be near Saturn tonight.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). Times will be different for other locations.
Addendum
February Evening Star Chart
The planets and stars are plotted for the 14th at 9 PM EST in the evening and 6 AM for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere (rotating star finder) you may have to set it to 45 minutes or one hour 45 minutes (Daylight Time) earlier than the current time.
Note the chart times of 9 p.m. and 6 a.m. are for the 14th and 15th. For each week before these dates, add ½ hour (28 minutes if you’re picky). For each week after, subtract ½ hour. Planet positions on dates other than the 15th can be found in the Wednesday planet posts on this blog.
February Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Follow the arc of the handle of the Big Dipper to the star Arcturus, and
- Extend like a spike to Spica,
- The Summer Triangle is in red.
Twilight Limits, Nautical and Astronomical
| EST | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2025-02-01 | 6h22m | 6h56m | 19h00m | 19h35m | 21h58m | 6h22m | 0.17 |
| 2025-02-02 | 6h21m | 6h55m | 19h02m | 19h36m | 23h16m | 6h21m | 0.27 |
| 2025-02-03 | 6h20m | 6h54m | 19h03m | 19h37m | – | 6h20m | 0.37 |
| 2025-02-04 | 6h19m | 6h53m | 19h04m | 19h38m | 0h35m | 6h19m | 0.49 |
| 2025-02-05 | 6h18m | 6h52m | 19h05m | 19h39m | 1h55m | 6h18m | 0.6 |
| 2025-02-06 | 6h17m | 6h51m | 19h07m | 19h41m | 3h15m | 6h17m | 0.71 |
| 2025-02-07 | 6h16m | 6h49m | 19h08m | 19h42m | 4h30m | 6h16m | 0.8 |
| 2025-02-08 | 6h14m | 6h48m | 19h09m | 19h43m | 5h36m | 6h14m | 0.88 |
| 2025-02-09 | 6h13m | 6h47m | 19h11m | 19h44m | – | – | 0.94 |
| 2025-02-10 | 6h12m | 6h46m | 19h12m | 19h46m | – | – | 0.98 |
| 2025-02-11 | 6h11m | 6h44m | 19h13m | 19h47m | – | – | 1 |
| 2025-02-12 | 6h09m | 6h43m | 19h14m | 19h48m | – | – | 1 |
| 2025-02-13 | 6h08m | 6h42m | 19h16m | 19h50m | – | – | 0.97 |
| 2025-02-14 | 6h07m | 6h40m | 19h17m | 19h51m | 19h51m | 20h35m | 0.93 |
| 2025-02-15 | 6h05m | 6h39m | 19h18m | 19h52m | 19h52m | 21h39m | 0.88 |
| 2025-02-16 | 6h04m | 6h38m | 19h20m | 19h53m | 19h53m | 22h43m | 0.81 |
| 2025-02-17 | 6h02m | 6h36m | 19h21m | 19h55m | 19h55m | 23h47m | 0.73 |
| 2025-02-18 | 6h01m | 6h35m | 19h22m | 19h56m | 19h56m | – | 0.64 |
| 2025-02-19 | 6h00m | 6h33m | 19h23m | 19h57m | 19h57m | 0h53m | 0.55 |
| 2025-02-20 | 5h58m | 6h32m | 19h25m | 19h58m | 19h58m | 2h00m | 0.46 |
| 2025-02-21 | 5h56m | 6h30m | 19h26m | 20h00m | 20h00m | 3h07m | 0.36 |
| 2025-02-22 | 5h55m | 6h29m | 19h27m | 20h01m | 20h01m | 4h10m | 0.26 |
| 2025-02-23 | 5h53m | 6h27m | 19h29m | 20h02m | 20h02m | 5h06m | 0.18 |
| 2025-02-24 | 5h52m | 6h25m | 19h30m | 20h04m | 20h04m | 5h52m | 0.1 |
| 2025-02-25 | 5h50m | 6h24m | 19h31m | 20h05m | 20h05m | 5h50m | 0.04 |
| 2025-02-26 | 5h48m | 6h22m | 19h33m | 20h06m | 20h06m | 5h48m | 0.01 |
| 2025-02-27 | 5h47m | 6h21m | 19h34m | 20h08m | 20h08m | 5h47m | 0 |
| 2025-02-28 | 5h45m | 6h19m | 19h35m | 20h09m | 20h09m | 5h45m | 0.02 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2019/09/27/
NASA Calendar of Planetary Events
Date Time Event
Feb 1 Sa Venus: 45° E
1 Sa 3:27 PM Moon-Venus: 2.4° N
1 Sa 5:06 PM Moon Ascending Node
1 Sa 9:43 PM Moon Perigee: 367500 km
5 We 3:02 AM First Quarter
6 Th 1:43 AM Moon-Pleiades: 0.5° S
8 Sa 5:40 AM Moon North Dec.: 28.6° N
9 Su 6:57 AM Mercury Superior Conj.
9 Su 2:36 PM Moon-Mars: 0.8° S
10 Mo 12:19 AM Moon-Pollux: 2.2° N
11 Tu 12:03 AM Moon-Beehive: 2.7° S
12 We 8:53 AM Full Moon
12 We 6:21 PM Moon-Regulus: 2.3° S
15 Sa 1:53 AM Moon Descending Node
17 Mo 7:01 AM Moon-Spica: 0.3° N
17 Mo 8:11 PM Moon Apogee: 404900 km
20 Th 12:32 PM Last Quarter
21 Fr 3:21 AM Moon-Antares: 0.5° N
22 Sa 5:32 PM Moon South Dec.: 28.7° S
27 Th 7:45 PM New Moon
Mar 1 Sa Venus: 30.4° E
All event times are given for UTC-5 Eastern Standard Time
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html
If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
February, 2025 Local time zone: EST
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sat 1| 08:01a 05:51p 09:50 | 06:58p 06:55a | Set 09:57p 15%|
+------+-----------------------+----------------+-----------------------+
|Sun 2| 08:00a 05:53p 09:53 | 06:59p 06:54a | Set 11:15p 24%|
|Mon 3| 07:59a 05:54p 09:55 | 07:00p 06:53a | Set 12:35a 35%|
|Tue 4| 07:57a 05:56p 09:58 | 07:01p 06:52a | Set 01:55a 46%|
|Wed 5| 07:56a 05:57p 10:01 | 07:03p 06:51a |F Qtr Set 03:14a 57%|
|Thu 6| 07:55a 05:59p 10:03 | 07:04p 06:50a | Set 04:30a 68%|
|Fri 7| 07:54a 06:00p 10:06 | 07:05p 06:48a | Set 05:36a 78%|
|Sat 8| 07:52a 06:01p 10:09 | 07:06p 06:47a | Set 06:29a 86%|
+------+-----------------------+----------------+-----------------------+
|Sun 9| 07:51a 06:03p 10:12 | 07:08p 06:46a | Set 07:10a 93%|
|Mon 10| 07:49a 06:04p 10:14 | 07:09p 06:45a | Set 07:42a 97%|
|Tue 11| 07:48a 06:06p 10:17 | 07:10p 06:43a | Set 08:06a 100%|
|Wed 12| 07:47a 06:07p 10:20 | 07:12p 06:42a |Full Rise 06:21p 100%|
|Thu 13| 07:45a 06:08p 10:23 | 07:13p 06:41a | Rise 07:29p 98%|
|Fri 14| 07:44a 06:10p 10:26 | 07:14p 06:39a | Rise 08:34p 94%|
|Sat 15| 07:42a 06:11p 10:29 | 07:16p 06:38a | Rise 09:38p 89%|
+------+-----------------------+----------------+-----------------------+
|Sun 16| 07:41a 06:13p 10:32 | 07:17p 06:37a | Rise 10:42p 82%|
|Mon 17| 07:39a 06:14p 10:35 | 07:18p 06:35a | Rise 11:47p 75%|
|Tue 18| 07:38a 06:15p 10:37 | 07:19p 06:34a | Rise 12:52a 66%|
|Wed 19| 07:36a 06:17p 10:40 | 07:21p 06:32a | Rise 01:59a 57%|
|Thu 20| 07:34a 06:18p 10:43 | 07:22p 06:31a |L Qtr Rise 03:06a 47%|
|Fri 21| 07:33a 06:20p 10:46 | 07:23p 06:29a | Rise 04:09a 38%|
|Sat 22| 07:31a 06:21p 10:49 | 07:25p 06:28a | Rise 05:06a 28%|
+------+-----------------------+----------------+-----------------------+
|Sun 23| 07:29a 06:22p 10:52 | 07:26p 06:26a | Rise 05:53a 19%|
|Mon 24| 07:28a 06:24p 10:55 | 07:27p 06:24a | Rise 06:30a 12%|
|Tue 25| 07:26a 06:25p 10:59 | 07:28p 06:23a | Rise 07:00a 6%|
|Wed 26| 07:24a 06:26p 11:02 | 07:30p 06:21a | Rise 07:25a 2%|
|Thu 27| 07:23a 06:28p 11:05 | 07:31p 06:20a |New Set 06:14p 0%|
|Fri 28| 07:21a 06:29p 11:08 | 07:32p 06:18a | Set 07:34p 1%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Created using my LookingUp for MS-DOS app.
Ephemeris: 12/31/2024 – Previewing January’s skies
This is Ephemeris for New Year’s Eve, Tuesday, December 31st. The Sun will rise at 8:20. It’ll be up for 8 hours and 52 minutes, setting at 5:12. The Moon, 1 day past new, will set at 5:46 this evening.
Let’s look ahead at the month of January 2025. Thursday we will have our latest sunrise at 8:20. That time will drop to 8:02 by the 31st. Sunset times are already increasing. On the 1st at 5:13, will extend to 5:50 at month’s end, which will push the daylight hours to 9 hours 47 minutes by then. The altitude of the Sun at local noon will increase from under 23 degrees tomorrow to 28 degrees at month’s end. Tomorrow we will reach our closest distance from the Sun of the year at 91.4 million miles. Friday morning will see the peak of the Quadrantid meteor shower. They will be best seen in the early morning and seem to come from near the handle of the Big Dipper, where possibly more than 60 meteors an hour might be seen.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). Times will be different for other locations.
Addendum
January Evening Star Chart
The planets and stars are plotted for the 15th at 9 PM EST in the evening and 6 AM on the 16th for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT), so the skies may not exactly match as seen from other locations.
January Morning Star Chart
For a list of constellation names to go with the abbreviations click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris the North Star.
- The leaky bowl of the Big Dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus, then
- Follow the spike to Spica.
- QuadR on the star charts is the radiant of the Quadrantid meteor shower which peaks on the 4th at 4:14 a.m. EST (9:14 UT).
Twilight Limits, Nautical and Astronomical
| EST | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2025-01-01 | 6h35m | 7h11m | 18h22m | 19h02m | 19h03m | 6h35m | 0.06 |
| 2025-01-02 | 6h35m | 7h11m | 18h23m | 19h02m | 20h21m | 6h35m | 0.12 |
| 2025-01-03 | 6h35m | 7h11m | 18h24m | 19h03m | 21h38m | 6h35m | 0.2 |
| 2025-01-04 | 6h35m | 7h11m | 18h25m | 19h04m | 22h54m | 6h35m | 0.3 |
| 2025-01-05 | 6h35m | 7h11m | 18h26m | 19h05m | – | 6h35m | 0.41 |
| 2025-01-06 | 6h35m | 7h11m | 18h27m | 19h06m | 0h10m | 6h35m | 0.53 |
| 2025-01-07 | 6h35m | 7h11m | 18h28m | 19h07m | 1h27m | 6h35m | 0.64 |
| 2025-01-08 | 6h35m | 7h10m | 18h29m | 19h08m | 2h45m | 6h35m | 0.74 |
| 2025-01-09 | 6h35m | 7h10m | 18h30m | 19h09m | 4h06m | 6h35m | 0.84 |
| 2025-01-10 | 6h35m | 7h10m | 18h31m | 19h10m | 5h26m | 6h35m | 0.91 |
| 2025-01-11 | 6h35m | 7h10m | 18h32m | 19h11m | – | – | 0.96 |
| 2025-01-12 | 6h34m | 7h09m | 18h33m | 19h12m | – | – | 0.99 |
| 2025-01-13 | 6h34m | 7h09m | 18h34m | 19h13m | – | – | 1 |
| 2025-01-14 | 6h34m | 7h09m | 18h35m | 19h14m | – | – | 0.98 |
| 2025-01-15 | 6h34m | 7h08m | 18h36m | 19h15m | 19h15m | 19h28m | 0.94 |
| 2025-01-16 | 6h33m | 7h08m | 18h37m | 19h16m | 19h16m | 20h38m | 0.89 |
| 2025-01-17 | 6h33m | 7h07m | 18h38m | 19h17m | 19h17m | 21h45m | 0.82 |
| 2025-01-18 | 6h32m | 7h07m | 18h39m | 19h18m | 19h18m | 22h49m | 0.74 |
| 2025-01-19 | 6h32m | 7h06m | 18h41m | 19h19m | 19h19m | 23h52m | 0.65 |
| 2025-01-20 | 6h31m | 7h06m | 18h42m | 19h20m | 19h20m | – | 0.56 |
| 2025-01-21 | 6h31m | 7h05m | 18h43m | 19h21m | 19h21m | 0h56m | 0.47 |
| 2025-01-22 | 6h30m | 7h05m | 18h44m | 19h23m | 19h23m | 2h01m | 0.37 |
| 2025-01-23 | 6h29m | 7h04m | 18h45m | 19h24m | 19h24m | 3h08m | 0.28 |
| 2025-01-24 | 6h29m | 7h03m | 18h47m | 19h25m | 19h25m | 4h16m | 0.2 |
| 2025-01-25 | 6h28m | 7h02m | 18h48m | 19h26m | 19h26m | 5h22m | 0.12 |
| 2025-01-26 | 6h27m | 7h02m | 18h49m | 19h27m | 19h27m | 6h24m | 0.06 |
| 2025-01-27 | 6h26m | 7h01m | 18h50m | 19h28m | 19h28m | 6h26m | 0.02 |
| 2025-01-28 | 6h26m | 7h00m | 18h51m | 19h30m | 19h30m | 6h26m | 0 |
| 2025-01-29 | 6h25m | 6h59m | 18h53m | 19h31m | 19h31m | 6h25m | 0.01 |
| 2025-01-30 | 6h24m | 6h58m | 18h54m | 19h32m | 19h32m | 6h24m | 0.04 |
| 2025-01-31 | 6h23m | 6h57m | 18h55m | 19h33m | 20h40m | 6h23m | 0.09 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
Jan 1 We Venus: 47° E
3 Fr 10:24 AM Moon-Venus: 1.5° N
3 Fr 10:24 AM Quadrantid Shower: ZHR = 120
4 Sa 2:59 AM Perihelion: 0.9833 AU
4 Sa 12:18 PM Moon-Saturn: 0.7° S
5 Su 2:46 PM Moon Ascending Node
6 Mo 6:56 PM First Quarter
7 Tu 6:35 PM Moon Perigee: 370200 km
9 Th 8:01 PM Moon-Pleiades: 0.3° S
9 Th 10:59 PM Venus Greatest Elongation: 47.2° E
11 Sa 11:30 PM Moon North Dec.: 28.5° N
13 Mo 4:45 PM Moon-Pollux: 2.2° N
13 Mo 5:27 PM Full Moon
13 Mo 10:42 PM Moon-Mars: 0.2° S Occultation!
14 Tu 4:03 PM Moon-Beehive: 2.7° S
15 We 8:17 PM Mars Opposition
16 Th 9:57 AM Moon-Regulus: 2.4° S
18 Sa 10:53 AM Venus-Saturn: 2.2° N
18 Sa 8:48 PM Moon Descending Node
20 Mo 10:53 PM Moon-Spica: 0.1° N
20 Mo 11:55 PM Moon Apogee: 404300 km
21 Tu 3:31 PM Last Quarter
23 Th 12:05 PM Mars-Pollux: 2.4° S
24 Fr 6:34 PM Moon-Antares: 0.3° N
26 Su 8:27 AM Moon South Dec.: 28.5° S
29 We 7:36 AM New Moon
31 Fr 5:02 PM Jupiter-Aldebaran: 5.2° N
31 Fr 11:46 PM Moon-Saturn: 1.1° S
Feb 1 Sa Venus: 45° E
All event times are given for UTC-5 Eastern Standard Time.
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
If you go to the above site you can print out a list like the above for the entire year or calendar pages for your time zone.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
January, 2025 Local time zone: EST
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Wed 1| 08:20a 05:13p 08:53 | 06:23p 07:09a | Set 07:02p 5%|
|Thu 2| 08:20a 05:14p 08:54 | 06:24p 07:09a | Set 08:20p 11%|
|Fri 3| 08:20a 05:15p 08:55 | 06:25p 07:10a | Set 09:37p 19%|
|Sat 4| 08:20a 05:16p 08:56 | 06:26p 07:10a | Set 10:54p 28%|
+------+-----------------------+----------------+-----------------------+
|Sun 5| 08:19a 05:17p 08:57 | 06:27p 07:10a | Set 12:09a 39%|
|Mon 6| 08:19a 05:18p 08:58 | 06:28p 07:09a |F Qtr Set 01:26a 50%|
|Tue 7| 08:19a 05:19p 08:59 | 06:29p 07:09a | Set 02:45a 61%|
|Wed 8| 08:19a 05:20p 09:01 | 06:30p 07:09a | Set 04:05a 72%|
|Thu 9| 08:18a 05:21p 09:02 | 06:31p 07:09a | Set 05:25a 82%|
|Fri 10| 08:18a 05:22p 09:04 | 06:32p 07:09a | Set 06:40a 89%|
|Sat 11| 08:18a 05:23p 09:05 | 06:33p 07:09a | Set 07:43a 95%|
+------+-----------------------+----------------+-----------------------+
|Sun 12| 08:17a 05:25p 09:07 | 06:34p 07:08a | Set 08:34a 99%|
|Mon 13| 08:17a 05:26p 09:08 | 06:35p 07:08a |Full Rise 05:00p 100%|
|Tue 14| 08:16a 05:27p 09:10 | 06:36p 07:08a | Rise 06:14p 99%|
|Wed 15| 08:16a 05:28p 09:12 | 06:37p 07:07a | Rise 07:27p 95%|
|Thu 16| 08:15a 05:30p 09:14 | 06:38p 07:07a | Rise 08:37p 90%|
|Fri 17| 08:15a 05:31p 09:16 | 06:39p 07:06a | Rise 09:44p 83%|
|Sat 18| 08:14a 05:32p 09:18 | 06:40p 07:06a | Rise 10:48p 76%|
+------+-----------------------+----------------+-----------------------+
|Sun 19| 08:13a 05:34p 09:20 | 06:42p 07:05a | Rise 11:52p 67%|
|Mon 20| 08:13a 05:35p 09:22 | 06:43p 07:05a | Rise 12:56a 58%|
|Tue 21| 08:12a 05:36p 09:24 | 06:44p 07:04a |L Qtr Rise 02:01a 49%|
|Wed 22| 08:11a 05:38p 09:26 | 06:45p 07:03a | Rise 03:07a 39%|
|Thu 23| 08:10a 05:39p 09:28 | 06:46p 07:03a | Rise 04:15a 30%|
|Fri 24| 08:09a 05:40p 09:31 | 06:48p 07:02a | Rise 05:22a 22%|
|Sat 25| 08:08a 05:42p 09:33 | 06:49p 07:01a | Rise 06:24a 14%|
+------+-----------------------+----------------+-----------------------+
|Sun 26| 08:07a 05:43p 09:35 | 06:50p 07:00a | Rise 07:17a 8%|
|Mon 27| 08:06a 05:44p 09:38 | 06:51p 07:00a | Rise 08:00a 3%|
|Tue 28| 08:05a 05:46p 09:40 | 06:52p 06:59a | Rise 08:34a 0%|
|Wed 29| 08:04a 05:47p 09:42 | 06:54p 06:58a |New Set 06:00p 0%|
|Thu 30| 08:03a 05:49p 09:45 | 06:55p 06:57a | Set 07:20p 3%|
|Fri 31| 08:02a 05:50p 09:47 | 06:56p 06:56a | Set 08:39p 8%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS program.
Ephemeris: 11/29/2024 – Previewing December skies
This is Ephemeris for Native American Heritage Day, Friday, November 29th. Today the Sun will be up for 9 hours and 5 minutes, setting at 5:04, and it will rise tomorrow at 7:59. The Moon, 2 days before new, will rise at 7:39 tomorrow morning.
Let’s look at December skies. We are now in the holiday season and about to celebrate the southernmost travel of the Sun in the sky and its return northward. So there is not much change in sunrise and sunset times. The Sun will stop its travel south, the winter solstice, on the 21st at 4:20 am. It will make that day the shortest day in terms of daylight hours. However, the earliest sunset will occur on the 9th. The Geminid meteor shower will be hampered by the bright Moon when it reaches its peak on the evening of the 13th, near the full moon. This month continues the surprisingly active sunspot cycle that started four years ago and is nearing its peak.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT – 5 hours). Times will be different for other locations.
Addendum (Updated 11/29/2024)
December Evening Star Chart
The planets and stars are plotted for the 15th at 9 pm EST in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT).
December Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- The leaky bowl of the Big Dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus, then
- Follow the spike to Spica.
- The Summer Triangle is in red.
- GemR on the star charts is the radiant of the Geminid meteor shower, which peaks on the evening of the 13th.
Twilight Limits, Nautical and Astronomical
| EST | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2024-12-01 | 6h17m | 6h52m | 18h12m | 18h47m | 18h47m | 6h17m | 0.01 |
| 2024-12-02 | 6h18m | 6h53m | 18h12m | 18h47m | 18h47m | 6h18m | 0.04 |
| 2024-12-03 | 6h19m | 6h54m | 18h12m | 18h47m | 18h49m | 6h19m | 0.09 |
| 2024-12-04 | 6h20m | 6h55m | 18h11m | 18h47m | 20h00m | 6h20m | 0.16 |
| 2024-12-05 | 6h21m | 6h56m | 18h11m | 18h47m | 21h15m | 6h21m | 0.24 |
| 2024-12-06 | 6h22m | 6h57m | 18h11m | 18h47m | 22h31m | 6h22m | 0.34 |
| 2024-12-07 | 6h22m | 6h58m | 18h11m | 18h47m | 23h47m | 6h22m | 0.45 |
| 2024-12-08 | 6h23m | 6h59m | 18h11m | 18h47m | – | 6h23m | 0.57 |
| 2024-12-09 | 6h24m | 6h59m | 18h11m | 18h47m | 1h03m | 6h24m | 0.68 |
| 2024-12-10 | 6h25m | 7h00m | 18h11m | 18h47m | 2h20m | 6h25m | 0.78 |
| 2024-12-11 | 6h26m | 7h01m | 18h12m | 18h47m | 3h39m | 6h26m | 0.87 |
| 2024-12-12 | 6h26m | 7h02m | 18h12m | 18h47m | 5h01m | 6h26m | 0.94 |
| 2024-12-13 | 6h27m | 7h02m | 18h12m | 18h47m | 6h24m | 6h27m | 0.98 |
| 2024-12-14 | 6h28m | 7h03m | 18h12m | 18h48m | – | – | 1.00 |
| 2024-12-15 | 6h28m | 7h04m | 18h12m | 18h48m | – | – | 0.99 |
| 2024-12-16 | 6h29m | 7h05m | 18h13m | 18h48m | – | – | 0.96 |
| 2024-12-17 | 6h30m | 7h05m | 18h13m | 18h49m | 18h49m | 19h23m | 0.90 |
| 2024-12-18 | 6h30m | 7h06m | 18h13m | 18h49m | 18h49m | 20h37m | 0.83 |
| 2024-12-19 | 6h31m | 7h06m | 18h14m | 18h49m | 18h49m | 21h48m | 0.75 |
| 2024-12-20 | 6h31m | 7h07m | 18h14m | 18h50m | 18h50m | 22h55m | 0.66 |
| 2024-12-21 | 6h32m | 7h07m | 18h15m | 18h50m | 18h50m | 0h00m | 0.57 |
| 2024-12-22 | 6h32m | 7h08m | 18h15m | 18h51m | 18h51m | – | 0.47 |
| 2024-12-23 | 6h33m | 7h08m | 18h16m | 18h51m | 18h51m | 1h03m | 0.38 |
| 2024-12-24 | 6h33m | 7h09m | 18h17m | 18h52m | 18h52m | 2h06m | 0.29 |
| 2024-12-25 | 6h34m | 7h09m | 18h17m | 18h53m | 18h53m | 3h10m | 0.21 |
| 2024-12-26 | 6h34m | 7h09m | 18h18m | 18h53m | 18h53m | 4h16m | 0.14 |
| 2024-12-27 | 6h34m | 7h10m | 18h18m | 18h54m | 18h54m | 5h24m | 0.08 |
| 2024-12-28 | 6h34m | 7h10m | 18h19m | 18h55m | 18h55m | 6h33m | 0.03 |
| 2024-12-29 | 6h35m | 7h10m | 18h20m | 18h55m | 18h55m | 6h35m | 0.01 |
| 2024-12-30 | 6h35m | 7h10m | 18h21m | 19h00m | 19h00m | 6h35m | 0.00 |
| 2024-12-31 | 6h35m | 7h11m | 18h21m | 19h01m | 19h01m | 6h35m | 0.02 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Dec 1 Su Venus: 43.6° E
1 Su 1:21 am New Moon
2 Mo 5:31 pm Moon South Dec.: 28.5° S
3 Tu 7:08 am Mars-Beehive: 1.6° N
4 We 5:40 pm Moon-Venus: 2.4° N
5 Th 9:11 pm Mercury Inferior Conj.
7 Sa 3:19 pm Jupiter Opposition
8 Su 3:49 am Moon-Saturn: .3° S
8 Su 10:27 am First Quarter
9 Mo 2:36 pm Moon Ascending Node
12 Th 8:18 am Moon Perigee: 365400 km
13 Fr 12:13 pm Moon-Pleiades: .1° S
13 Fr 8:12 pm Geminid Shower: ZHR = 120
15 Su 4:02 am Full Moon
15 Su 3:12 pm Moon North Dec.: 28.4° N
17 Tu 7:12 am Moon-Pollux: 2.1° N
18 We 3:46 am Moon-Mars: 1° S
18 We 6:28 am Moon-Beehive: 2.8° S
20 Fr 12:37 am Moon-Regulus: 2.6° S
21 Sa 4:20 am Winter Solstice
22 Su 5:00 am Ursid Shower: ZHR = 10
22 Su 5:18 pm Last Quarter
22 Su 6:21 pm Moon Descending Node
23 Mo 4:39 pm Mercury-Antares: 6.8° N
24 Tu 2:25 am Moon Apogee: 404500 km
24 Tu 2:28 pm Moon-Spica: .2° S
24 Tu 8:59 pm Mercury Elongation: 22° W
28 Sa 9:37 am Moon-Antares: .1° N
30 Mo 12:06 am Moon South Dec.: 28.4° S
30 Mo 5:27 pm New Moon
Jan 1 We Venus: 47° E
Generated using my LookingUp for DOS program.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
December, 2024 Local time zone: EST
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun 1| 08:00a 05:03p 09:02 | 06:12p 06:51a |New Set 04:56p 1%|
|Mon 2| 08:01a 05:03p 09:01 | 06:12p 06:52a | Set 05:47p 3%|
|Tue 3| 08:02a 05:02p 09:00 | 06:12p 06:53a | Set 06:48p 8%|
|Wed 4| 08:03a 05:02p 08:58 | 06:12p 06:54a | Set 07:59p 14%|
|Thu 5| 08:04a 05:02p 08:57 | 06:12p 06:54a | Set 09:14p 23%|
|Fri 6| 08:05a 05:02p 08:56 | 06:12p 06:55a | Set 10:31p 32%|
|Sat 7| 08:06a 05:02p 08:55 | 06:12p 06:56a | Set 11:47p 43%|
+------+-----------------------+----------------+-----------------------+
|Sun 8| 08:07a 05:02p 08:54 | 06:12p 06:57a |F Qtr Set 01:03a 54%|
|Mon 9| 08:08a 05:02p 08:53 | 06:12p 06:58a | Set 02:20a 65%|
|Tue 10| 08:09a 05:02p 08:52 | 06:12p 06:59a | Set 03:39a 76%|
|Wed 11| 08:10a 05:02p 08:51 | 06:12p 07:00a | Set 05:00a 85%|
|Thu 12| 08:11a 05:02p 08:51 | 06:12p 07:00a | Set 06:24a 92%|
|Fri 13| 08:12a 05:02p 08:50 | 06:13p 07:01a | Set 07:45a 97%|
|Sat 14| 08:12a 05:02p 08:49 | 06:13p 07:02a | Set 08:57a 100%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 08:13a 05:02p 08:49 | 06:13p 07:02a |Full Rise 05:01p 99%|
|Mon 16| 08:14a 05:03p 08:48 | 06:13p 07:03a | Rise 06:09p 96%|
|Tue 17| 08:14a 05:03p 08:48 | 06:14p 07:04a | Rise 07:23p 92%|
|Wed 18| 08:15a 05:03p 08:48 | 06:14p 07:04a | Rise 08:36p 85%|
|Thu 19| 08:16a 05:04p 08:48 | 06:15p 07:05a | Rise 09:47p 77%|
|Fri 20| 08:16a 05:04p 08:48 | 06:15p 07:05a | Rise 10:55p 68%|
|Sat 21| 08:17a 05:05p 08:48 | 06:16p 07:06a | Rise 11:59p 59%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 08:17a 05:05p 08:48 | 06:16p 07:06a |L Qtr Rise 01:02a 49%|
|Mon 23| 08:18a 05:06p 08:48 | 06:17p 07:07a | Rise 02:05a 40%|
|Tue 24| 08:18a 05:07p 08:48 | 06:17p 07:07a | Rise 03:10a 31%|
|Wed 25| 08:18a 05:07p 08:48 | 06:18p 07:08a | Rise 04:16a 23%|
|Thu 26| 08:19a 05:08p 08:49 | 06:19p 07:08a | Rise 05:24a 15%|
|Fri 27| 08:19a 05:09p 08:49 | 06:19p 07:08a | Rise 06:32a 9%|
|Sat 28| 08:19a 05:09p 08:50 | 06:20p 07:09a | Rise 07:38a 4%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 08:19a 05:10p 08:50 | 06:21p 07:09a | Rise 08:36a 1%|
|Mon 30| 08:19a 05:11p 08:51 | 06:21p 07:09a |New Set 04:37p 0%|
|Tue 31| 08:20a 05:12p 08:52 | 06:22p 07:09a | Set 05:46p 1%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS program.
Ephemeris: 10/31/2024 – Previewing November skies
This is Ephemeris for Halloween, Thursday, October 31st. The Sun will rise at 8:20. It’ll be up for 10 hours and 11 minutes, setting at 6:32. The Moon, 1 day before new, will rise at 8:34 tomorrow morning.
The month of November is one of early sunsets, especially with the return to standard time this Sunday, and shortening of daylight hours. Daylight hours will decrease from 10 hours 9 minutes tomorrow the 1st to 9 hours 4 minutes at month’s end. The altitude of the Sun above the southern horizon at local noon, which will drop from 31 degrees to 23½ degrees over the month. Apparent local noon this month will be around 12:30 PM. The sunset time on the 30th will be only 2 minutes later than the earliest sunset of the year. The sunrise time on the 30th will still have 22 minutes and a month to go until the latest sunrise. The Leonid meteor shower will have a peak on the morning of 17th with the Moon a day and a half past full spoiling the show. We are about 9 years away from the next Leonid meteor storm.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). Times will be different for other locations.
Addendum
November Evening Star Chart
The planets and stars are plotted for the 15th at 9 p.m. EST in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 45 minutes earlier than the current time.
November Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Follow the arc of the handle of the Big Dipper to the star Arcturus
- The Summer Triangle is in red.
- TauR on the evening star chart can be used as the radiant for the North and South Taurid meteor showers. For dates see NASA Calendar of Planetary Events below
- LeoR on the morning star chart is the radiant of the Leonid meteor shower, which peaks on the morning of the 17th.
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2024-11-01 | 6h44m | 7h18m | 19h35m | 20h13m | 20h13m | 6h44m | 0.00 |
| 2024-11-02 | 6h45m | 7h19m | 19h34m | 20h12m | 20h12m | 6h45m | 0.03 |
| EST | |||||||
| 2024-11-03 | 5h46m | 6h20m | 18h32m | 19h10m | 19h10m | 5h46m | 0.07 |
| 2024-11-04 | 5h47m | 6h21m | 18h31m | 19h09m | 19h09m | 5h47m | 0.13 |
| 2024-11-05 | 5h49m | 6h23m | 18h30m | 19h08m | 19h52m | 5h49m | 0.20 |
| 2024-11-06 | 5h50m | 6h24m | 18h29m | 19h07m | 20h56m | 5h50m | 0.29 |
| 2024-11-07 | 5h51m | 6h25m | 18h28m | 19h06m | 22h08m | 5h51m | 0.39 |
| 2024-11-08 | 5h52m | 6h26m | 18h27m | 19h05m | 23h25m | 5h52m | 0.50 |
| 2024-11-09 | 5h53m | 6h27m | 18h26m | 19h04m | – | 5h53m | 0.61 |
| 2024-11-10 | 5h54m | 6h29m | 18h25m | 19h03m | 0h42m | 5h54m | 0.72 |
| 2024-11-11 | 5h56m | 6h30m | 18h24m | 19h02m | 2h00m | 5h56m | 0.81 |
| 2024-11-12 | 5h57m | 6h31m | 18h23m | 19h01m | 3h19m | 5h57m | 0.90 |
| 2024-11-13 | 5h58m | 6h32m | 18h22m | 19h00m | 4h40m | 5h58m | 0.96 |
| 2024-11-14 | 5h59m | 6h33m | 18h21m | 18h56m | – | – | 0.99 |
| 2024-11-15 | 6h00m | 6h35m | 18h20m | 18h55m | – | – | 1.00 |
| 2024-11-16 | 6h01m | 6h36m | 18h20m | 18h54m | – | – | 0.98 |
| 2024-11-17 | 6h02m | 6h37m | 18h19m | 18h53m | – | – | 0.93 |
| 2024-11-18 | 6h03m | 6h38m | 18h18m | 18h53m | 18h53m | 19h22m | 0.86 |
| 2024-11-19 | 6h05m | 6h39m | 18h17m | 18h52m | 18h52m | 20h33m | 0.78 |
| 2024-11-20 | 6h06m | 6h40m | 18h17m | 18h51m | 18h51m | 21h45m | 0.68 |
| 2024-11-21 | 6h07m | 6h41m | 18h16m | 18h51m | 18h51m | 22h56m | 0.59 |
| 2024-11-22 | 6h08m | 6h43m | 18h15m | 18h50m | 18h50m | – | 0.49 |
| 2024-11-23 | 6h09m | 6h44m | 18h15m | 18h50m | 18h50m | 0h04m | 0.39 |
| 2024-11-24 | 6h10m | 6h45m | 18h14m | 18h49m | 18h49m | 1h09m | 0.30 |
| 2024-11-25 | 6h11m | 6h46m | 18h14m | 18h49m | 18h49m | 2h12m | 0.22 |
| 2024-11-26 | 6h12m | 6h47m | 18h14m | 18h48m | 18h48m | 3h15m | 0.15 |
| 2024-11-27 | 6h13m | 6h48m | 18h13m | 18h48m | 18h48m | 4h18m | 0.09 |
| 2024-11-28 | 6h14m | 6h49m | 18h13m | 18h48m | 18h48m | 5h23m | 0.04 |
| 2024-11-29 | 6h15m | 6h50m | 18h12m | 18h47m | 18h47m | 6h15m | 0.01 |
| 2024-11-30 | 6h16m | 6h51m | 18h12m | 18h47m | 18h47m | 6h16m | 0.00 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
Nov 1 Fr Venus: 38.2° E
1 Fr 7:47 am New Moon
3 Su 7:26 pm Moon-Antares: .1° N
4 Mo 7:16 pm Moon-Venus: 3.4° N
5 Tu 1:26 am South Taurid Shower: ZHR = 10
5 Tu 12:18 pm Moon South Dec.: 28.6° S
9 Sa 12:56 am First Quarter
9 Sa 11:24 pm Mercury-Antares: 2° N
10 Su 8:36 pm Moon-Saturn: .1° S
12 Tu 12:43 am North Taurid Shower: ZHR = 15
12 Tu 10:59 am Moon Ascending Node
14 Th 6:18 am Moon Perigee: 360100 km
15 Fr 4:29 pm Full Moon
16 Sa 1:59 am Moon-Pleiades: .1° S
16 Sa 2:59 am Mercury Elongation: 22.5° E
16 Sa 9:48 pm Uranus Opposition
17 Su 7:01 am Leonid Shower: ZHR = 15
18 Mo 5:22 am Moon North Dec.: 28.5° N
19 Tu 9:07 pm Moon-Pollux: 1.9° N
20 We 4:07 pm Moon-Mars: 2.6° S
20 We 8:48 pm Moon-Beehive: 3.1° S
22 Fr 3:48 pm Moon-Regulus: 3° S
22 Fr 8:28 pm Last Quarter
25 Mo 4:31 pm Moon Descending Node
26 Tu 6:56 am Moon Apogee: 405300 km
27 We 6:33 am Moon-Spica: .5° S
Dec 1 Su Venus: 43.6° E
All event times for November 1 & 2 are given for UTC-4 Eastern Daylight Saving Time. For dates after that, times are given for UTC-5 Eastern Standard Time.
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.
Sun and Moon Rising and Setting Times
LU Ephemeris of Sky Events for Interlochen/TC November, 2024 Local time zone: EDT +-----------------------------------------------------------------------+ | DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM | | | RISE SET HOURS | END START |PHASE SET** TIME FRACTN| +=======================================================================+ |Fri 1| 08:21a 06:30p 10:09 | 07:35p 07:16a |New Set 06:18p 0%| |Sat 2| 08:22a 06:29p 10:06 | 07:34p 07:17a | Set 06:43p 2%| +------+-----------------------+----------------+-----------------------+ | EST | Time Change | | | |Sun 3| 07:24a 05:27p 10:03 | 06:33p 06:18a | Set 06:16p 6%| |Mon 4| 07:25a 05:26p 10:01 | 06:32p 06:20a | Set 06:58p 11%| |Tue 5| 07:26a 05:25p 09:58 | 06:30p 06:21a | Set 07:51p 18%| |Wed 6| 07:28a 05:24p 09:55 | 06:29p 06:22a | Set 08:56p 27%| |Thu 7| 07:29a 05:22p 09:53 | 06:28p 06:23a | Set 10:08p 37%| |Fri 8| 07:31a 05:21p 09:50 | 06:27p 06:25a | Set 11:24p 47%| |Sat 9| 07:32a 05:20p 09:48 | 06:26p 06:26a |F Qtr Set 12:42a 58%| +------+-----------------------+----------------+-----------------------+ |Sun 10| 07:33a 05:19p 09:45 | 06:25p 06:27a | Set 02:00a 69%| |Mon 11| 07:35a 05:18p 09:43 | 06:24p 06:28a | Set 03:19a 79%| |Tue 12| 07:36a 05:17p 09:40 | 06:23p 06:29a | Set 04:39a 88%| |Wed 13| 07:37a 05:16p 09:38 | 06:22p 06:31a | Set 06:03a 95%| |Thu 14| 07:39a 05:15p 09:35 | 06:22p 06:32a | Set 07:28a 99%| |Fri 15| 07:40a 05:14p 09:33 | 06:21p 06:33a |Full Rise 04:48p 100%| |Sat 16| 07:41a 05:13p 09:31 | 06:20p 06:34a | Rise 05:28p 98%| +------+-----------------------+----------------+-----------------------+ |Sun 17| 07:43a 05:12p 09:29 | 06:19p 06:35a | Rise 06:19p 94%| |Mon 18| 07:44a 05:11p 09:26 | 06:18p 06:36a | Rise 07:22p 87%| |Tue 19| 07:45a 05:10p 09:24 | 06:18p 06:38a | Rise 08:32p 79%| |Wed 20| 07:47a 05:09p 09:22 | 06:17p 06:39a | Rise 09:45p 70%| |Thu 21| 07:48a 05:08p 09:20 | 06:16p 06:40a | Rise 10:56p 60%| |Fri 22| 07:49a 05:08p 09:18 | 06:16p 06:41a |L Qtr Rise 12:04a 51%| |Sat 23| 07:50a 05:07p 09:16 | 06:15p 06:42a | Rise 01:09a 41%| +------+-----------------------+----------------+-----------------------+ |Sun 24| 07:52a 05:06p 09:14 | 06:15p 06:43a | Rise 02:12a 32%| |Mon 25| 07:53a 05:06p 09:12 | 06:14p 06:44a | Rise 03:15a 24%| |Tue 26| 07:54a 05:05p 09:11 | 06:14p 06:45a | Rise 04:18a 16%| |Wed 27| 07:55a 05:05p 09:09 | 06:14p 06:46a | Rise 05:23a 10%| |Thu 28| 07:57a 05:04p 09:07 | 06:13p 06:48a | Rise 06:30a 5%| |Fri 29| 07:58a 05:04p 09:05 | 06:13p 06:49a | Rise 07:39a 2%| |Sat 30| 07:59a 05:03p 09:04 | 06:13p 06:50a | Rise 08:47a 0%| +-----------------------------------------------------------------------+ * Nautical Twilight ** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS program.
Ephemeris: 10/01/2024 – Previewing the skies of October
This is Ephemeris for Tuesday, October 1st. Today the Sun will be up for 11 hours and 40 minutes, setting at 7:22, and it will rise tomorrow at 7:42. The Moon, 1 day before new, will rise at 7:30 tomorrow morning.
Let’s look at the skies for the month of October. The Sun will still be moving south rapidly. Daylight hours in the Interlochen/Traverse City area and will drop from 11 hours and 40 minutes today to 10 hours, 11 minutes at month’s end. The altitude of the Sun above the southern horizon at local noon will be 42 degrees today, and will descend to 31 degrees on Halloween, also in the Interlochen area. Sunrise times will increase from 7:41 today all the way to 8:20 a.m. in Interlochen and Traverse City on the 31st. Sunset times will decrease from 7:22 p.m. today to 6:32 on Halloween.
The big event of October will be the appearance of Comet Tsuchinshan-ATLAS in the evening sky which may become quite bright, but being a comet, all bets are off until you actually see it. It will become visible in the evening sky starting October 12th.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT – 4 hours). Times will be different for other locations.
Addendum
October path of Comet Tsuchinshan-ATLAS
October Evening Star Chart
The planets and stars are plotted for the 15th at 9 p.m. EDT in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.
October Morning Star Chart
or a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Leaky dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus.
- The Summer Triangle is in red.
- DracR – Draconid Radiant – Peaks the 8th – Zenithal Hourly Rate < 10 with rare outbursts of a thousand an hour. It’s hindered this year by the full moon.
- OriR – Orionid Radiant – Peak 21st – Zenithal Hourly Rate = 20
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2024-10-01 | 6h06m | 6h40m | 20h28m | 21h03m | 21h03m | 6h06m | 0.00 |
| 2024-10-02 | 6h07m | 6h41m | 20h27m | 21h01m | 21h01m | 6h07m | 0.00 |
| 2024-10-03 | 6h08m | 6h42m | 20h25m | 20h59m | 20h59m | 6h08m | 0.02 |
| 2024-10-04 | 6h09m | 6h43m | 20h23m | 20h57m | 20h57m | 6h09m | 0.05 |
| 2024-10-05 | 6h11m | 6h45m | 20h21m | 20h55m | 20h55m | 6h11m | 0.10 |
| 2024-10-06 | 6h12m | 6h46m | 20h19m | 20h53m | 20h53m | 6h12m | 0.17 |
| 2024-10-07 | 6h13m | 6h47m | 20h17m | 20h51m | 21h15m | 6h13m | 0.25 |
| 2024-10-08 | 6h14m | 6h48m | 20h16m | 20h50m | 22h01m | 6h14m | 0.34 |
| 2024-10-09 | 6h16m | 6h50m | 20h14m | 20h48m | 22h58m | 6h16m | 0.44 |
| 2024-10-10 | 6h17m | 6h51m | 20h12m | 20h46m | – | 6h17m | 0.55 |
| 2024-10-11 | 6h18m | 6h52m | 20h10m | 20h44m | 0h06m | 6h18m | 0.65 |
| 2024-10-12 | 6h19m | 6h53m | 20h09m | 20h43m | 1h22m | 6h19m | 0.76 |
| 2024-10-13 | 6h21m | 6h54m | 20h07m | 20h41m | 2h42m | 6h21m | 0.85 |
| 2024-10-14 | 6h22m | 6h56m | 20h05m | 20h39m | 4h03m | 6h22m | 0.92 |
| 2024-10-15 | 6h23m | 6h57m | 20h04m | 20h37m | 5h25m | 6h23m | 0.98 |
| 2024-10-16 | 6h24m | 6h58m | 20h02m | 20h36m | – | – | 1.00 |
| 2024-10-17 | 6h26m | 6h59m | 20h00m | 20h34m | – | – | 0.99 |
| 2024-10-18 | 6h27m | 7h01m | 19h55m | 20h33m | – | – | 0.96 |
| 2024-10-19 | 6h28m | 7h02m | 19h53m | 20h31m | – | – | 0.89 |
| 2024-10-20 | 6h29m | 7h03m | 19h52m | 20h29m | 20h29m | 20h40m | 0.81 |
| 2024-10-21 | 6h31m | 7h04m | 19h50m | 20h28m | 20h28m | 21h36m | 0.72 |
| 2024-10-22 | 6h32m | 7h05m | 19h49m | 20h26m | 20h26m | 22h41m | 0.62 |
| 2024-10-23 | 6h33m | 7h07m | 19h47m | 20h25m | 20h25m | 23h51m | 0.51 |
| 2024-10-24 | 6h34m | 7h08m | 19h46m | 20h23m | 20h23m | – | 0.41 |
| 2024-10-25 | 6h35m | 7h09m | 19h44m | 20h22m | 20h22m | 1h01m | 0.32 |
| 2024-10-26 | 6h37m | 7h10m | 19h43m | 20h21m | 20h21m | 2h10m | 0.23 |
| 2024-10-27 | 6h38m | 7h12m | 19h42m | 20h19m | 20h19m | 3h16m | 0.16 |
| 2024-10-28 | 6h39m | 7h13m | 19h40m | 20h18m | 20h18m | 4h19m | 0.10 |
| 2024-10-29 | 6h40m | 7h14m | 19h39m | 20h17m | 20h17m | 5h22m | 0.05 |
| 2024-10-30 | 6h41m | 7h15m | 19h37m | 20h15m | 20h15m | 6h25m | 0.02 |
| 2024-10-31 | 6h43m | 7h16m | 19h36m | 20h14m | 20h14m | 6h43m | 0.00 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Date Time Event
Oct 1 Tu Venus: 31.4° E
2 We 7:52 am Moon Descending Node
2 We 2:46 pm Annular Solar Eclipse
2 We 2:49 pm New Moon
2 We 3:40 pm Moon Apogee: 406500 km
5 Sa 4:26 pm Moon-Venus: 3.3° N
7 Mo 2:48 pm Moon-Antares: .2° N
9 We 7:53 am Moon South Dec.: 28.7° S
10 Th 2:55 pm First Quarter
14 Mo 2:05 pm Moon-Saturn: .1° S
16 We 3:05 am Moon Ascending Node
16 We 8:46 pm Moon Perigee: 357200 km
17 Th 7:26 am Full Moon
18 Fr 7:50 pm Mars-Pollux: 5.7° S
19 Sa 3:59 pm Moon-Pleiades: .1° S
21 Mo 1:58 am Orionid Shower: ZHR = 20
21 Mo 8:50 pm Moon North Dec.: 28.7° N
23 We 1:16 pm Moon-Pollux: 1.8° N
23 We 3:55 pm Moon-Mars: 4.2° S
24 Th 4:03 am Last Quarter
24 Th 1:35 pm Moon-Beehive: 3.3° S
25 Fr 7:43 pm Venus-Antares: 3.1° N
29 Tu 12:44 pm Moon Descending Node
29 Tu 5:50 pm Moon Apogee: 406200 km
Nov 1 Fr Venus: 38.2° E
All event times are given for UTC-4 hr: Eastern Daylight Saving Time.
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC),
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.
Sun and Moon Rising and Setting Times
LU Ephemeris of Sky Events for Interlochen/TC
October, 2024 Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Tue 1| 07:41a 07:22p 11:40 | 08:25p 06:38a | Rise 07:30a 1%|
|Wed 2| 07:42a 07:20p 11:37 | 08:23p 06:39a |New Set 07:16p 0%|
|Thu 3| 07:43a 07:18p 11:34 | 08:21p 06:40a | Set 07:33p 1%|
|Fri 4| 07:45a 07:16p 11:31 | 08:19p 06:42a | Set 07:51p 4%|
|Sat 5| 07:46a 07:14p 11:28 | 08:17p 06:43a | Set 08:13p 9%|
+------+-----------------------+----------------+-----------------------+
|Sun 6| 07:47a 07:13p 11:25 | 08:15p 06:44a | Set 08:40p 15%|
|Mon 7| 07:48a 07:11p 11:22 | 08:14p 06:45a | Set 09:15p 23%|
|Tue 8| 07:50a 07:09p 11:19 | 08:12p 06:47a | Set 10:00p 32%|
|Wed 9| 07:51a 07:07p 11:16 | 08:10p 06:48a | Set 10:57p 42%|
|Thu 10| 07:52a 07:05p 11:13 | 08:08p 06:49a |F Qtr Set 12:05a 52%|
|Fri 11| 07:53a 07:04p 11:10 | 08:07p 06:50a | Set 01:22a 63%|
|Sat 12| 07:55a 07:02p 11:07 | 08:05p 06:51a | Set 02:41a 73%|
+------+-----------------------+----------------+-----------------------+
|Sun 13| 07:56a 07:00p 11:04 | 08:03p 06:53a | Set 04:03a 83%|
|Mon 14| 07:57a 06:58p 11:01 | 08:02p 06:54a | Set 05:24a 91%|
|Tue 15| 07:58a 06:57p 10:58 | 08:00p 06:55a | Set 06:47a 97%|
|Wed 16| 08:00a 06:55p 10:55 | 07:58p 06:56a | Set 08:11a 100%|
|Thu 17| 08:01a 06:53p 10:52 | 07:57p 06:58a |Full Rise 06:53p 100%|
|Fri 18| 08:02a 06:52p 10:49 | 07:55p 06:59a | Rise 07:21p 96%|
|Sat 19| 08:04a 06:50p 10:46 | 07:54p 07:00a | Rise 07:55p 91%|
+------+-----------------------+----------------+-----------------------+
|Sun 20| 08:05a 06:48p 10:43 | 07:52p 07:01a | Rise 08:40p 83%|
|Mon 21| 08:06a 06:47p 10:40 | 07:50p 07:02a | Rise 09:35p 74%|
|Tue 22| 08:08a 06:45p 10:37 | 07:49p 07:04a | Rise 10:40p 64%|
|Wed 23| 08:09a 06:44p 10:34 | 07:47p 07:05a | Rise 11:50p 53%|
|Thu 24| 08:10a 06:42p 10:31 | 07:46p 07:06a |L Qtr Rise 01:01a 43%|
|Fri 25| 08:12a 06:40p 10:28 | 07:45p 07:07a | Rise 02:09a 34%|
|Sat 26| 08:13a 06:39p 10:25 | 07:43p 07:09a | Rise 03:15a 25%|
+------+-----------------------+----------------+-----------------------+
|Sun 27| 08:14a 06:37p 10:23 | 07:42p 07:10a | Rise 04:19a 17%|
|Mon 28| 08:16a 06:36p 10:20 | 07:40p 07:11a | Rise 05:22a 11%|
|Tue 29| 08:17a 06:34p 10:17 | 07:39p 07:12a | Rise 06:24a 6%|
|Wed 30| 08:18a 06:33p 10:14 | 07:38p 07:14a | Rise 07:28a 2%|
|Thu 31| 08:20a 06:32p 10:11 | 07:36p 07:15a | Rise 08:34a 0%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS program.
Ephemeris: 09/02/2024 – Previewing September Skies
This is Ephemeris for Labor Day, Monday, September 2nd. Today the Sun will be up for 13 hours and 9 minutes, setting at 8:16, and it will rise tomorrow at 7:08. The Moon is new today, and won’t be visible.
Let’s look at the skies for September. Daylight hours in the Interlochen/Traverse City area and will drop from 13 hours and 9 minutes today to 11 hours 43 minutes on the 30th. The altitude of the sun above the southern horizon at local noon will be 53 degrees today, and will descend to 42 degrees on the 30th. The official season of summer is getting short too, so enjoy it while you can. Summer will end and autumn will begin at 8:44 a.m. on the 22nd as the Sun will pass overhead at the equator heading southward. It will also mark sunset at the North Pole and sunrise at the South Pole. Southern Hemisphere dwellers will see the start of spring. The summer Milky Way is still visible to explore with binoculars or telescope.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). Times will be different for other locations.
Addendum
September Evening Star Chart
The planets and stars are plotted for the 15th at 10 p.m. EDT in the evening and 6 a.m. for the morning chart. These are the chart times. Note that Traverse City is located approximately 45 minutes behind our time meridian, West 75° longitude. (An hour 45 minutes behind our daylight saving time meridian during EDT). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes earlier than the current time.
September Morning Star Chart
For a list of constellation names to go with the abbreviations, click here.
- Pointer stars at the front of the bowl of the Big Dipper point to Polaris, the North Star.
- Leaky dipper drips on Leo.
- Follow the arc of the handle of the Big Dipper to the star Arcturus.
- The Summer Triangle is in red.
Twilight Limits, Nautical and Astronomical
| EDT | |||||||
| Morning | Twilight | Evening | Twilight | Dark | Night | Moon | |
| Date | Astro. | Nautical | Nautical | Astro. | Start | End | Illum. |
| 2024-09-01 | 5h23m | 6h01m | 21h28m | 22h06m | 22h06m | 5h21m | 0.01 |
| 2024-09-02 | 5h25m | 6h02m | 21h26m | 22h04m | 22h04m | 5h25m | 0.00 |
| 2024-09-03 | 5h26m | 6h04m | 21h24m | 22h01m | 22h01m | 5h26m | 0.01 |
| 2024-09-04 | 5h28m | 6h05m | 21h22m | 21h59m | 21h59m | 5h28m | 0.04 |
| 2024-09-05 | 5h29m | 6h07m | 21h20m | 21h57m | 21h57m | 5h29m | 0.09 |
| 2024-09-06 | 5h31m | 6h08m | 21h18m | 21h55m | 21h55m | 5h31m | 0.15 |
| 2024-09-07 | 5h32m | 6h09m | 21h16m | 21h53m | 21h53m | 5h32m | 0.22 |
| 2024-09-08 | 5h34m | 6h11m | 21h14m | 21h50m | 22h09m | 5h34m | 0.30 |
| 2024-09-09 | 5h35m | 6h12m | 21h12m | 21h48m | 22h39m | 5h35m | 0.40 |
| 2024-09-10 | 5h37m | 6h13m | 21h10m | 21h46m | 23h17m | 5h37m | 0.50 |
| 2024-09-11 | 5h38m | 6h15m | 21h08m | 21h44m | – | 5h38m | 0.60 |
| 2024-09-12 | 5h40m | 6h16m | 21h06m | 21h42m | 0h08m | 5h40m | 0.70 |
| 2024-09-13 | 5h41m | 6h17m | 21h04m | 21h40m | 1h12m | 5h41m | 0.80 |
| 2024-09-14 | 5h43m | 6h18m | 21h02m | 21h37m | 2h26m | 5h43m | 0.88 |
| 2024-09-15 | 5h44m | 6h20m | 21h00m | 21h35m | 3h47m | 5h44m | 0.95 |
| 2024-09-16 | 5h45m | 6h21m | 20h58m | 21h33m | 5h11m | 5h45m | 0.99 |
| 2024-09-17 | 5h47m | 6h22m | 20h56m | 21h31m | – | – | 1.00 |
| 2024-09-18 | 5h48m | 6h24m | 20h54m | 21h29m | – | – | 0.98 |
| 2024-09-19 | 5h50m | 6h25m | 20h52m | 21h27m | – | – | 0.94 |
| 2024-09-20 | 5h51m | 6h26m | 20h50m | 21h25m | – | – | 0.86 |
| 2024-09-21 | 5h52m | 6h27m | 20h48m | 21h23m | 21h23m | 21h25m | 0.77 |
| 2024-09-22 | 5h54m | 6h29m | 20h46m | 21h21m | 21h21m | 22h03m | 0.67 |
| 2024-09-23 | 5h55m | 6h30m | 20h44m | 21h19m | 21h19m | 22h50m | 0.56 |
| 2024-09-24 | 5h56m | 6h31m | 20h42m | 21h17m | 21h17m | 23h48m | 0.46 |
| 2024-09-25 | 5h58m | 6h32m | 20h40m | 21h15m | 21h15m | – | 0.35 |
| 2024-09-26 | 5h59m | 6h34m | 20h38m | 21h13m | 21h13m | 0h53m | 0.26 |
| 2024-09-27 | 6h00m | 6h35m | 20h36m | 21h11m | 21h11m | 2h02m | 0.18 |
| 2024-09-28 | 6h02m | 6h36m | 20h34m | 21h09m | 21h09m | 3h12m | 0.11 |
| 2024-09-29 | 6h03m | 6h37m | 20h32m | 21h07m | 21h07m | 4h19m | 0.06 |
| 2024-09-30 | 6h04m | 6h39m | 20h30m | 21h05m | 21h05m | 5h24m | 0.02 |
Twilight calendar was generated using Cartes du Ciel (Sky Charts).
See my blog post: Twilight Zone for the definitions of the different periods of twilight here: https://bobmoler.wordpress.com/2018/09/27/.
NASA Calendar of Planetary Events
Sep 1 Su Venus: 24.1° E
2 Mo 9:55 pm New Moon
4 We 9:59 pm Mercury Elongation: 18.1° W
5 Th 1:43 am Moon Descending Node
5 Th 6:13 am Moon-Venus: 1.3° N
5 Th 10:55 am Moon Apogee: 406200 km
6 Fr 12:22 pm Moon-Spica: .6° S
7 Sa 11:54 pm Saturn Opposition
8 Su 10:52 pm Mercury-Regulus: .4° N
10 Tu 8:29 am Moon-Antares: .1° N
11 We 2:06 am First Quarter
12 Th 12:51 am Moon South Dec.: 28.7° S
17 Tu 6:14 am Moon-Saturn: .3° S
17 Tu 10:34 pm Full Moon (Harvest Moon)
17 Tu 10:45 pm Partial Lunar Eclipse (See below)
17 Tu 10:59 pm Venus-Spica: 2.4° N
18 We 9:26 am Moon Perigee: 357300 km
18 We 3:51 pm Moon Ascending Node
20 Fr 6:43 pm Neptune Opposition
22 Su 6:16 am Moon-Pleiades: .2° S
22 Su 8:44 am Autumnal Equinox
24 Tu 1:04 pm Moon North Dec.: 28.7° N
24 Tu 2:50 pm Last Quarter
26 Th 6:25 am Moon-Pollux: 1.8° N
27 Fr 7:08 am Moon-Beehive: 3.4° S
30 Mo 4:59 pm Mercury Superior Conj.
Oct 1 Tu Venus: 31.4° E
All event times are given for UTC-4 hr: Eastern Daylight Saving Time.
Sky Events Calendar by Fred Espenak and Sumit Dutta (NASA’s GSFC), with modifications by the author.
http://eclipse.gsfc.nasa.gov/SKYCAL/SKYCAL.html.
If you go to the above site, you can print out a list like the above for the entire year or calendar pages for your time zone.
Sun and Moon Rising and Setting Events
LU Ephemeris of Sky Events for Interlochen/TC
September, 2024 Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE | SUN SUN DAYLIGHT| TWILIGHT* |MOON RISE OR ILLUM |
| | RISE SET HOURS | END START |PHASE SET** TIME FRACTN|
+=======================================================================+
|Sun 1| 07:05a 08:18p 13:12 | 09:24p 05:59a | Rise 06:27a 1%|
|Mon 2| 07:07a 08:16p 13:09 | 09:22p 06:00a |New Set 08:22p 0%|
|Tue 3| 07:08a 08:14p 13:06 | 09:20p 06:02a | Set 08:38p 1%|
|Wed 4| 07:09a 08:12p 13:03 | 09:18p 06:03a | Set 08:53p 3%|
|Thu 5| 07:10a 08:11p 13:00 | 09:16p 06:05a | Set 09:09p 7%|
|Fri 6| 07:11a 08:09p 12:57 | 09:14p 06:06a | Set 09:26p 13%|
|Sat 7| 07:12a 08:07p 12:54 | 09:12p 06:07a | Set 09:45p 20%|
+------+-----------------------+----------------+-----------------------+
|Sun 8| 07:14a 08:05p 12:51 | 09:10p 06:09a | Set 10:08p 28%|
|Mon 9| 07:15a 08:03p 12:48 | 09:08p 06:10a | Set 10:38p 38%|
|Tue 10| 07:16a 08:01p 12:45 | 09:06p 06:11a | Set 11:17p 47%|
|Wed 11| 07:17a 07:59p 12:42 | 09:04p 06:13a |F Qtr Set 12:07a 58%|
|Thu 12| 07:18a 07:58p 12:39 | 09:02p 06:14a | Set 01:11a 68%|
|Fri 13| 07:19a 07:56p 12:36 | 09:00p 06:15a | Set 02:25a 78%|
|Sat 14| 07:21a 07:54p 12:33 | 08:58p 06:16a | Set 03:47a 86%|
+------+-----------------------+----------------+-----------------------+
|Sun 15| 07:22a 07:52p 12:30 | 08:56p 06:18a | Set 05:10a 93%|
|Mon 16| 07:23a 07:50p 12:26 | 08:54p 06:19a | Set 06:34a 98%|
|Tue 17| 07:24a 07:48p 12:23 | 08:52p 06:20a |Full Rise 07:47p 100%|
|Wed 18| 07:25a 07:46p 12:20 | 08:50p 06:22a | Rise 08:08p 99%|
|Thu 19| 07:27a 07:44p 12:17 | 08:48p 06:23a | Rise 08:30p 95%|
|Fri 20| 07:28a 07:42p 12:14 | 08:46p 06:24a | Rise 08:55p 88%|
|Sat 21| 07:29a 07:41p 12:11 | 08:44p 06:25a | Rise 09:25p 79%|
+------+-----------------------+----------------+-----------------------+
|Sun 22| 07:30a 07:39p 12:08 | 08:42p 06:27a | Rise 10:02p 69%|
|Mon 23| 07:31a 07:37p 12:05 | 08:40p 06:28a | Rise 10:50p 58%|
|Tue 24| 07:33a 07:35p 12:02 | 08:38p 06:29a |L Qtr Rise 11:47p 48%|
|Wed 25| 07:34a 07:33p 11:59 | 08:36p 06:30a | Rise 12:53a 37%|
|Thu 26| 07:35a 07:31p 11:56 | 08:34p 06:32a | Rise 02:02a 28%|
|Fri 27| 07:36a 07:29p 11:53 | 08:32p 06:33a | Rise 03:11a 20%|
|Sat 28| 07:37a 07:27p 11:50 | 08:30p 06:34a | Rise 04:18a 12%|
+------+-----------------------+----------------+-----------------------+
|Sun 29| 07:39a 07:25p 11:46 | 08:28p 06:35a | Rise 05:24a 7%|
|Mon 30| 07:40a 07:24p 11:43 | 08:27p 06:37a | Rise 06:27a 3%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise
Generated using my LookingUp for DOS app.
Bob Moler's Ephemeris Blog 
