Bob Moler's Ephemeris Blog

Ephemeris for Thursday, June 1st. Today the Sun will be up for 15 hours and 20 minutes, setting at 9:20, and it will rise tomorrow at 5:59. The Moon, at first quarter today, will set at 2:49 tomorrow morning.

This is the 42nd anniversary of this program as we start our 43rd orbit of the Sun. Let’s take a look at June skies. There will be a lot of Sun this month. The daylight hours will increase a bit from 15 hours and 20 minutes today to 15 hours and 33 minutes on the 21st, retreating back to 15 hours 30 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 on the solstice, June 21st will be 68 and three-quarters degrees in Interlochen. Summer will start at 12:25 a.m.

The times given are for the Traverse City/Interlochen area of Michigan. They may be different for your location.

Addenda

June Evening Star Chart

Star Chart for June 2017 (11 p.m. June 15, 2017). Created using my LookingUp program. Click on image to enlarge.

The planets and stars are plotted for the 15th at 11 p.m. EDT in the evening and 5 a.m. 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 and 45 minutes behind our daylight standard time meridian. during EST). To duplicate the star positions on a planisphere you may have to set it to 1 hour 45 minutes (Daylight Time) or 45 minutes (Standard Time) earlier than the current time if you are near your time meridian.

Note the chart times of 11 p.m. and 5 a.m. are for the 15th. For each week before the 15th add ½ hour. For each week after the 15th subtract ½ hour. The planet positions are updated each Wednesday on this blog.

June Morning Star Chart

Star Chart for June 2017 mornings based on 4:30 a.m. June 15th. Created using my LookingUp program. Click on image to enlarge.

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 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

Evening nautical twilight ends at 10:47 p.m. EDT on the 1st, increasing to 11:00 p.m. EDT on the 30th.
Evening astronomical twilight ends at 11:46 p.m. EDT on the 1st, increasing to 12:03 a.m. EDT on the 30th.
Morning astronomical twilight starts at 3:42 a.m. EDT on the 1st, and changing to 3:37 a.m. EDT on the 30th.
Morning nautical twilight starts at 4:41 a.m. EDT on the 1st, and changing to 4:40 a.m. EDT on the 30th.

NASA Calendar of Planetary Events

 Date Time Event
Jun 01 Th          Venus: 45.8° W
    01 Th  8:42 am First Quarter
    03 Sa  6:59 am Venus Greatest Western Elongation: 45.9°
    03 Sa  7:57 am Moon-Jupiter: 2.5° S
    06 Tu 11:19 pm Mercury-Pleiades: 5.5° S
    08 Th  6:21 pm Moon Apogee: 406400 km
    09 Fr  9:10 am Full Moon
    09 Fr  9:25 pm Moon-Saturn: 3.4° S
    10 Sa 11:36 pm Moon South Dec.: 19.4° S
    14 We 10:40 pm Moon Descending Node
    15 Th  5:15 am Saturn Opposition
    17 Sa  7:33 am Last Quarter
    20 Tu  5:13 pm Moon-Venus: 2.4° N
    21 We 12:25 am Summer Solstice
    21 We  9:55 am Mercury Superior Conjunction with the Sun
    22 Th 10:23 am Moon-Aldebaran: 0.5° S
    23 Fr  6:49 am Moon Perigee: 357900 km
    23 Fr 10:31 am New Moon
    24 Sa  7:12 am Moon North Dec.: 19.4° N
    26 Mo  7:18 am Moon-Beehive: 3.2° N
    27 Tu 12:26 pm Moon Ascending Node
    27 Tu  8:26 pm Moon-Regulus: 0.1° N
    30 Fr  8:51 pm First Quarter
Jul 01 Sa          Venus: 43.7° W

June 2017 Calendar

LU                  Ephemeris of Sky Events for Interlochen/TC
June, 2017    Local time zone: EDT
+-----------------------------------------------------------------------+
| DATE |  SUN     SUN  DAYLIGHT|   TWILIGHT*    |MOON  RISE OR    ILLUM |
|      |  RISE    SET    HOURS |  END    START  |PHASE SET** TIME FRACTN|
+=======================================================================+
|Thu  1| 06:00a  09:21p  15:21 | 10:44p  04:37a |F Qtr Set  02:49a   55%|
|Fri  2| 05:59a  09:22p  15:22 | 10:46p  04:36a |      Set  03:18a   65%|
|Sat  3| 05:59a  09:23p  15:23 | 10:47p  04:35a |      Set  03:45a   74%|
+------+-----------------------+----------------+-----------------------+
|Sun  4| 05:58a  09:23p  15:25 | 10:48p  04:34a |      Set  04:12a   82%|
|Mon  5| 05:58a  09:24p  15:26 | 10:49p  04:34a |      Set  04:40a   89%|
|Tue  6| 05:58a  09:25p  15:27 | 10:50p  04:33a |      Set  05:10a   94%|
|Wed  7| 05:57a  09:26p  15:28 | 10:50p  04:33a |      Set  05:44a   98%|
|Thu  8| 05:57a  09:26p  15:29 | 10:51p  04:32a |      Set  06:22a  100%|
|Fri  9| 05:57a  09:27p  15:30 | 10:52p  04:32a |Full  Rise 09:26p  100%|
|Sat 10| 05:57a  09:27p  15:30 | 10:53p  04:31a |      Rise 10:17p   98%|
+------+-----------------------+----------------+-----------------------+
|Sun 11| 05:56a  09:28p  15:31 | 10:54p  04:31a |      Rise 11:03p   95%|
|Mon 12| 05:56a  09:28p  15:32 | 10:54p  04:31a |      Rise 11:45p   89%|
|Tue 13| 05:56a  09:29p  15:32 | 10:55p  04:30a |      Rise 12:23a   83%|
|Wed 14| 05:56a  09:29p  15:33 | 10:55p  04:30a |      Rise 12:57a   75%|
|Thu 15| 05:56a  09:30p  15:33 | 10:56p  04:30a |      Rise 01:29a   65%|
|Fri 16| 05:56a  09:30p  15:34 | 10:56p  04:30a |      Rise 01:59a   55%|
|Sat 17| 05:56a  09:31p  15:34 | 10:57p  04:30a |L Qtr Rise 02:29a   44%|
+------+-----------------------+----------------+-----------------------+
|Sun 18| 05:56a  09:31p  15:34 | 10:57p  04:30a |      Rise 03:00a   34%|
|Mon 19| 05:56a  09:31p  15:34 | 10:57p  04:30a |      Rise 03:33a   23%|
|Tue 20| 05:57a  09:31p  15:34 | 10:58p  04:30a |      Rise 04:11a   14%|
|Wed 21| 05:57a  09:32p  15:34 | 10:58p  04:30a |      Rise 04:54a    7%|
|Thu 22| 05:57a  09:32p  15:34 | 10:58p  04:31a |      Rise 05:45a    2%|
|Fri 23| 05:57a  09:32p  15:34 | 10:58p  04:31a |New   Set  09:01p    0%|
|Sat 24| 05:58a  09:32p  15:34 | 10:58p  04:31a |      Set  10:03p    1%|
+------+-----------------------+----------------+-----------------------+
|Sun 25| 05:58a  09:32p  15:34 | 10:58p  04:32a |      Set  10:56p    5%|
|Mon 26| 05:58a  09:32p  15:33 | 10:58p  04:32a |      Set  11:41p   12%|
|Tue 27| 05:59a  09:32p  15:33 | 10:58p  04:33a |      Set  12:18a   20%|
|Wed 28| 05:59a  09:32p  15:32 | 10:58p  04:33a |      Set  12:51a   29%|
|Thu 29| 06:00a  09:32p  15:32 | 10:57p  04:34a |      Set  01:21a   39%|
|Fri 30| 06:00a  09:32p  15:31 | 10:57p  04:35a |F Qtr Set  01:49a   50%|
+-----------------------------------------------------------------------+
* Nautical Twilight
** Moonrise or moonset, whichever occurs between sunset and sunrise