Archive
Ephemeris: 05/08/2024 – Saturn comes tottering into the morning twilight
This is Ephemeris for Wednesday, May 8th. Today the Sun will be up for 14 hours and 34 minutes, setting at 8:56, and it will rise tomorrow at 6:21. The Moon, 1 day past new, will set at 10:12 this evening.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Jupiter now is too close to the direction of the Sun to be seen. It will move to be in conjunction with the Sun on the 18th of this month and by late June may be visible in the morning sky in twilight. By 5:30 tomorrow morning, about 40 minutes before sunrise, Saturn will be low in the east-southeast and Mars will be lower yet in the east. In telescopes, Saturn will look fairly different this year and next with its rings nearly edge on to us. They will open up a bit through October before closing again. We won’t see the rings go exactly edge on because Saturn will be too close to the Sun in the sky on March 23rd next year. After that the rings will open up again.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum
You may wonder why I use the word tottering in title. The planet Saturn is named after the Roman god of old age, probably because it takes nearly 30 years to orbit the Sun. Even though it’s moving away from twilight faster than Mars is, it’s just the fact that the Sun and Mars are moving faster to the east than it is, leaving him in the dust, so to speak.

Ephemeris: 04/24/2024 – Where have the naked-eye planets wandered off to this week?
This is Bob Moler with Ephemeris for Wednesday, April 24th. Today the Sun will be up for 13 hours and 57 minutes, setting at 8:39, and it will rise tomorrow at 6:41. The Moon, 1 day past full, will rise at 9:49 this evening.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Jupiter, looking not-so bright in twilight is very low and in the west. It will set at 10:23 pm. I’m giving Jupiter another week of evening visibility. Comet 12P/Pons-Brooks now only visible to observers south of the equator. In the morning, Mars and Saturn will be close together in the east southeastern sky at 6 am. They will be fighting the bright morning twilight and low altitude then. Saturn will be difficult to see right now in the twilight. Mars will be harder to spot. Saturn will look fairly different this year and next with its rings nearly edge on to us. They will look more like a line through the planet.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum





Ephemeris: 04/17/2024 – Where have all the planets gone?
This is Ephemeris for Wednesday, April 17th. Today the Sun will be up for 13 hours and 36 minutes, setting at 8:31, and it will rise tomorrow at 6:52. The Moon, 2 days past first quarter, will set at 5:04 tomorrow morning.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Bright Jupiter is very low and in the west. It will set at 10:23 pm. We are getting close to losing Jupiter in the evening sky. Comet 12P/Pons-Brooks is just below-left of it. Observers in the Southern Hemisphere might now get a chance to spot it, but I believe it’s too far gone for us. In the morning, Mars and Saturn will be very close together in the east southeastern sky at 6:30. They will be fighting the bright morning twilight and low altitude then. Saturn will be difficult to see right now in the twilight . It will look fairly different this year and next with its rings nearly edge on to us. They will look more like a line through the planet.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum





None of the planets are good telescopic objects now, due to their low position in the sky, and twilight.

Ephemeris: 04/03/2024 – Where have the naked-eye planets wandered off to this week?
This is Ephemeris for Wednesday, April 3rd. Today the Sun will be up for 12 hours and 54 minutes, setting at 8:13, and it will rise tomorrow at 7:17. The Moon, 2 days past last quarter, will rise at 5:33 tomorrow morning.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Mercury is now too close to the Sun to be spotted. Bright Jupiter is due west at 8:45 pm or a half hour after sunset. It will set at 11:05 pm. We are getting close to losing Jupiter in the evening sky. Comet 12P/Pons-Brooks is right of and a bit below Jupiter in the evening. Though officially naked-eye brightness, one has to have very good eyes, binoculars or telescope to spot it. In my Wednesday blog posts at bobmoler.wordpress.com I have finder charts. In the morning Mars, and especially Venus and Saturn may be impossible to spot, in the east-southeast in the bright twilight. Mars will rise at 6:10, and will be very low in the east-southeast at 6:45 am.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum


During the solar eclipse on the 8th, during totality, the comet will be located around the 2nd to the last position of its track. However, unless it is obviously noticeable, totality time is too short to use trying to find it. Enjoy the glory of the sun’s corona for the brief time you have.




Ephemeris: 03/27/2024 – Let’s find out where the naked-eye planets have wandered off to this week
This is Ephemeris for Wednesday, March 27th. Today the Sun will be up for 12 hours and 33 minutes, setting at 8:04, and it will rise tomorrow at 7:30. The Moon, 2 days past full, will rise at 10:50 this evening.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Mercury is visible in the evening sky shortly after sunset appearing very low in the west. It will be visible for the next few days or so, slowly heading back toward the Sun since this past Sunday. Higher up in the sky is bright Jupiter in the west southwest. It will set at 11:25 pm. Jupiter will be visible in the evening for only about another month or so. In the morning Mars, and especially Venus and Saturn may be impossible to spot, in the east-southeast in the bright twilight. Mars will rise at 6:28, and will be very low in the east-southeast. Comet 12P/Pons-Brooks is below-right of Jupiter in the evening. I’ll have more about it tomorrow.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum






Ephemeris: 03/20/2024 – Let’s find out where the naked-eye planets have wandered off to this week
This is Ephemeris for Wednesday, March 20th. Today the Sun will be up for 12 hours and 11 minutes, setting at 7:56, and it will rise tomorrow at 7:43. The Moon, 3 days past first quarter, will set at 6:38 tomorrow morning.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Mercury is visible in the evening sky shortly after sunset appearing very low in the west. It will be visible for the next week or so, moving away from the Sun, but getting dimmer, and starting back toward the Sun after Sunday. Higher up in the sky is bright Jupiter in the west southwest. It will set at 11:45 pm. Jupiter will be visible in the evening for only about another month or so. In the morning Mars, Venus and Saturn may be impossible to spot, in the east-southeast in the bright twilight. Mars will rise at 6:43 am, followed by Venus at 7:13, with Saturn right below it.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum




Ephemeris: 03/13/2024 – Where have the naked-eye planets wandered off to this week?
This is Ephemeris for Wednesday, March 13th. Today the Sun will be up for 11 hours and 49 minutes, setting at 7:47, and it will rise tomorrow at 7:55. The Moon, 3 days past new, will set at 12:28 tomorrow morning.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Mercury is beginning to become visible in the evening sky shortly after sunset appearing very low in the west. It will be visible for the next week or so, moving away from the Sun, but getting dimmer. Higher up in the sky Jupiter and the moon are close together this evening With Jupiter to the left and below the crescent Moon in the west southwest. It will set at 12:08 am. Jupiter will be visible in the evening for only about another month or so. In the morning Mars and Venus may be impossible to spot, in the east-southeast in the bright twilight. Mars will rise at 6:57 am, followed by Venus at 7:21.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EDT, UT–4 hours). They may be different for your location.
Addendum



Ephemeris: 02/28/2024 – Where have the naked-eye planets wandered off to this week?
This is Ephemeris for Wednesday, February 28th. Today the Sun will be up for 11 hours and 5 minutes, setting at 6:28, and it will rise tomorrow at 7:21. The Moon, halfway from full to last quarter, will rise at 10:52 this evening.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left to see. Saturn, and Mercury are gone, both actually in conjunction with the Sun today. Jupiter will be in the west-southwest at 8 this evening. It will set at 11:47 pm in the west. Jupiter will be visible in the evening for only about two more months. Venus, the morning star, will rise in the east-southeast at 6:27 am, but its brilliance is diminished by the bright twilight and its low position in the sky. It will be very low in the east-southeast at 7 am. Mars might be impossible to spot, being a bit to the right and above Venus. A pair of binoculars, at least, will be needed to spot it in the morning twilight.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.
Addendum




Jupiter’s moon Io will pass behind (be occulted by) the planet at 8:17 pm EST. It will reappear at 11:39 pm away from the planet because until then it’ll still be in Jupiter’s shadow.
The ” symbol means seconds of arc (1/3600th of a degree). Created using Cartes du Ciel (Sky Charts) and GIMP.

Ephemeris: 02/21/2024 – Where have the naked-eye planets wandered off to this week?
This is Ephemeris for Wednesday, February 21st. Today the Sun will be up for 10 hours and 44 minutes, setting at 6:19, and it will rise tomorrow at 7:32. The Moon, 3 days before full, will set at 7:09 tomorrow morning.
Let’s find out where the naked-eye planets have wandered off to this week, and see what planets are left. Saturn, and Mercury are gone, being too close to the Sun to be visible. Jupiter will be in the west-southwest at 8 this evening. It will set at 12:11 am in the west. Jupiter will be visible in the evening for only about two more months. Venus, the morning star, will rise in the east-southeast at 6:33 am, but its brilliance is diminished by the bright twilight and its low position in the sky. It will be very low in the southeast at 7 am. This might be our first chance to spot Mars in the morning sky because tomorrow morning it will be just below Venus by about 1 1/2 moon diameters. A pair of binoculars may be needed to spot it.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.
Addendum




Jupiter’s missing moon is Io, which is behind the planet. It will reappear at 9:43 pm away from the planet because until then it’ll still be in Jupiter’s shadow. At 10:02 pm Europa will begin to transit across the face of the planet.
The ” symbol means seconds of arc (1/3600th of a degree). Created using Cartes du Ciel (Sky Charts) and GIMP.

Ephemeris: 02/14/2024 – A Valentine’s Day look at the bright planets
This is Ephemeris for Valentine’s Day and Ash Wednesday, Wednesday, February 14th. Today the Sun will be up for 10 hours and 24 minutes, setting at 6:09, and it will rise tomorrow at 7:43. The Moon, 2 days before first quarter, will set at 12:31 tomorrow morning.
Let’s find out where the naked -eyed planets have wandered off to this week, and see what planets are left. Saturn, for all practical purposes, is gone, setting an hour after the sun. Jupiter will be in the southwest at 7:30 this evening, above and left to the crescent moon. It will move to the low west -northwest by midnight and will set at 12:30 am. Venus, the morning star, will rise into the east-southeast at 6:30 am, but its brilliance is diminished by the bright twilight and its low position in the sky. It will be very low in the southeast at seven am. Being Ash Wednesday, Easter is 46 days away. But Lent has 40 days. The six Sundays in Lent don’t count.
The astronomical event times given are for the Traverse City/Interlochen area of Michigan (EST, UT –5 hours). They may be different for your location.
Addendum







