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Ephemeris: 08/22/2025 – Star Party tomorrow night the 23rd
This is Ephemeris for Friday, August 22nd. Today the Sun will be up for 13 hours and 42 minutes, setting at 8:36, and it will rise tomorrow at 6:55. The Moon, 1 day before new, will rise at 7:10 tomorrow morning.
Weather permitting, the Grand Traverse Astronomical Society and the Park Rangers will host a star party at Sleeping Bear Dunes National Lakeshore, at the Dune Climb tomorrow night, starting around 9 PM. The parking lane closest to the dune will be blocked off for telescopes. The start time is after sunset, and the brighter stars will be visible by 9:15. As it gets darker some of the brighter interstellar wonders of our Milky Way galaxy, will appear, with many star clusters and nebulae, including a peek at the Great Andromeda Galaxy next door. The Rangers will leave around 11 PM however if it stays clear and there’s enough interest, society members with their telescopes will stay longer. This is the last Sleeping Bear Dunes star party this year.
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
Ephemeris: 07/25/2025 – Star Party tomorrow night
This is Ephemeris for Friday, July 25th. Today the Sun will be up for 14 hours and 54 minutes, setting at 9:16, and it will rise tomorrow at 6:22. The Moon, 1 day past new, will set at 10:09 this evening.
Weather permitting, the Grand Traverse Astronomical Society and the Park Rangers will host a star party at Sleeping Bear Dunes National Lakeshore, at the Dune Climb tomorrow night, starting around 9:00 PM. The parking lane closest to the dune will be blocked off for telescopes. Note… the start time is before actual sunset, however the brighter stars will be visible by 9:45. Also on tap will be binary stars, an interesting treat through the telescope. Then, as it gets darker some of the brighter interstellar wonders will appear. The Rangers leave around 11:00 PM however if it stays clear and there’s enough interest, society members with their telescopes will stay longer. Another star party is planned at the Dunes this summer, on August 23rd.
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
Ephemeris: 06/27/2025 – Star party tomorrow night at the Sleeping Bear Dunes
This is Ephemeris for Friday, June 27th. Today the Sun will be up for 15 hours and 33 minutes, setting at 9:32, and it will rise tomorrow at 5:59. The Moon, 2 days past new, will set at 11:44 this evening.
Weather permitting, the Grand Traverse Astronomical Society and the Park Rangers will host a star party at Sleeping Bear Dunes National Lakeshore, at the Dune Climb starting around 9:00 PM. The parking lane closest to the dune will be blocked off for telescopes. Note… the start time is before actual sunset, however the Moon should be visible from near sunset and after until nearly 11 PM Also on tap will be binary stars, an interesting treat through the telescope. The Rangers leave around 11:00 PM however if it stays clear and there’s enough interest, society members with their telescopes will stay longer. Two other star parties are planned this summer: on July 26th and August 23rd.
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
Ephemeris: 08/30/2024 – Star party tomorrow night
This is Ephemeris for Friday, August 30th. Today the Sun will be up for 13 hours and 18 minutes, setting at 8:22, and it will rise tomorrow at 7:04. The Moon, 3 days before new, will rise at 4:11 tomorrow morning.
Weather permitting, a Star Party will be held tomorrow night at the Sleeping Bear Dunes National Lakeshore at the Dune Climb. The viewing will start at 9 pm. These events will be hosted by the park rangers and the Grand Traverse Astronomical Society, who will bring their telescopes to view the heavens, including the planet Saturn and the wonders of the summer Milky Way. The telescopes will be setup in the parking area closest to the dune. While twilight fades Saturn will be about the only object to view in the east-southeast. As it gets darker more and more wonders of the Milky Way will be seen. They include star clusters and nebulae, clouds of gas and dust that lie in abundance in the Milky Way.
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
Ephemeris: 08/09/2024 – Star Party tomorrow night!
This is Ephemeris for Friday, August 9th. Today the Sun will be up for 14 hours and 17 minutes, setting at 8:56, and it will rise tomorrow at 6:40. The Moon, 3 days before first quarter, will set at 11:03 this evening.
Tomorrow The Grand Traverse Astronomical Society will be part of the Port Oneida Rural Arts and Culture Fair, an event sponsored by the Sleeping Bear Dunes National Lakeshore. The society will bring their telescopes to the Thoreson Farm on South Thoreson Road off M22 North of Glen Arbor for a Star Party beginning at 9 p.m. South Thoreson Road is a loop off M22. On tap will be the fat waxing crescent Moon and some of the brighter wonders of the summer sky. Even though the moonlit skies will be bright, there are plenty of wonders still visible in the telescopes. We might have a shot at Saturn later in the evening along with a few bright Perseid meteors to wow the viewer. The peak of the Perseid meteor shower will be Monday morning after the Moon sets.
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
Ephemeris: 07/26/2024 – View the Sun from the Sleeping Bear Dunes tomorrow
Sorry, I’ve posted this a bit late.
This is Ephemeris for Friday, July 26th. Today the Sun will be up for 14 hours and 51 minutes, setting at 9:14, and it will rise tomorrow at 6:24. The Moon, 1 day before last quarter, will rise at 12:03 tomorrow morning.
Tomorrow, Saturday, July 27th there will be solar viewing at the Sleeping Bear Dunes National Lakeshore, at the Dune Climb from 3 to 6 PM. Park Rangers will be joined by members of the Grand Traverse Astronomical Society with their specially filtered telescopes to view the sun safely. This is a period of great solar activity. Remember the Northern Lights of last month? Solar filtered telescopes will safely view the surface of the sun, called the photosphere and sunspots, while the society also has two special solar telescopes with which to view the layer of gas above the surface called the chromosphere and prominences which look like flames coming off the chromosphere. This is the last of the two solar observing opportunities this summer.
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: 07/12/2024 – Star Party tomorrow night at Sleeping Bear Dunes National Lakeshore
This is Bob Moler with Ephemeris for Friday, July 12th. Today the Sun will be up for 15 hours and 17 minutes, setting at 9:27, and it will rise tomorrow at 6:10. The Moon, 1 day before first quarter, will set at 12:42 tomorrow morning.
Tomorrow night, Saturday, July 13th, the Sleeping Bear Dunes National Lakeshore will team up with the Grand Traverse Astronomical Society to host a star party at the Dune Climb from 9 to 11 PM or later. It won’t be a star party only, because the featured attraction will be the first quarter Moon. To my mind, this is the best time to view the Moon, showing its craters with deep shadows near the terminator or sunrise line which crosses the Moon slowly over the month. There are no planets out in the evening, but we do have some interesting stars to look at besides the Moon. And the bright International Space Station will be seen moving from west to northeast, passing through the bowl of the Big Dipper around 10:28 pm.
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
Translations of some lunar feature names according to Virtual Moon Atlas
Mare Crisium – Sea of Crises
Mare Fecunditatis – Sea of Fruitfulness
Mare Frigoris – Sea of Cold
Mare Imbrium – Sea of Showers
Mare Nectaris – Sea of Nectar
Mare Serenitatis – Sea of Serenity
Mare Tranquillitatis – Sea of Tranquility
Mare Vaporum – Sea of Vapors
Montes Alpes – Alps Mountains
Montes Apenninus – Apennines Mountains
Craters are named for persons, real or otherwise.
Ephemeris: 06/28/2024 – Solar viewing at Sleeping Bear Dunes tomorrow
This is Ephemeris for Friday, June 28th. Today the Sun will be up for 15 hours and 32 minutes, setting at 9:32, and it will rise tomorrow at 6:00. The Moon, at last quarter today, will rise at 1:37 tomorrow morning.
Tomorrow, Saturday, June 29th there will be solar viewing at the Sleeping Bear Dunes National Lakeshore, at the Dune Climb from 3 to 6 PM. Park Rangers will be joined by members of the Grand Traverse Astronomical Society with their specially filtered telescopes to view the Sun safely. This is a period of great solar activity. Remember the Aurora Borealis of a few weeks ago. Solar filtered telescopes will safely view the surface of the sun, called the photosphere and sunspots, while the society also has two special solar telescopes with which to view the layer of gas above the surface called the chromosphere and prominences which look like flames coming off the chromosphere. This is one of two solar observing opportunities this summer.
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: 06/14/2024 – Star Party at the Sleeping Bear Dunes tomorrow night*
* if it’s clear or mostly clear.
This is Bob Moler with Ephemeris for Flag Day, Friday, June 14th. Today the Sun will be up for 15 hours and 33 minutes, setting at 9:30, and it will rise tomorrow at 5:56. The Moon, at first quarter today, will set at 2:22 tomorrow morning.
Tomorrow night, Saturday, June 15th, the Sleeping Bear Dunes National Lakeshore will team up with the Grand Traverse Astronomical Society to host a star party at the Dune Climb from 9 to 11 PM. It won’t be a star party exactly, because the featured attraction will be the Moon, nearly two days after first quarter. To my mind, this is about the best time to view the Moon showing its craters with deep shadows near the terminator or sunrise line which crosses the moon slowly over the month. There are no planets out in the evening, but we do have some interesting stars to look at besides the Moon. The fairly bright Chinese Tiangong Space Station will pass below the position of the Moon at 10:22 that evening.**
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
** The information of the Tiangong space station pass came from heavens-above.com. The space station was also displayed in Stellarium when set to the proper time. Tiangong was predicted to be first magnitude by both sources, but Heavens-Above predicted a magnitude twice as bright as Stellarium.
Ephemeris Extra: Star Party Tomorrow night, 10/21/2023, if it’s clear
Update: 10/21/2023 The Star Party has been canceled due to weather (clouds)
This was the last planned star party at the Sleeping Bear Dunes this year. Look for star parties in 2024. Also, there will be a star party after the Grand Traverse Astronomical Society meetings, November 3rd and December 1st, of course weather permitting, at Northwestern Michigan College’s Joseph H. Rogers Observatory. The observatory is located south of Traverse City on Birmley Road. Meetings start at 8 pm, and are not weather dependent, with observing after (approximately 9 pm) if it’s clear. Topic of the meeting programs: November: A documentary video Jack Newton’s Journey to the Stars. Jack Newton (1942-) is a Canadian amateur astronomer and pioneering astrophotographer. December: Ancient Greek astronomy.
Original Post Below
Members of the Grand Traverse Astronomical Society will team up with the park rangers of the Sleeping Bear Dunes National Lakeshore for the last star party of the year celebrating the park’s 53rd anniversary. It will take place at the Dune Climb. Of course, it will only occur if it is clear or partly cloudy. It starts at 4 pm with solar observing using personal and the society’s solar telescopes. Starting at 7 pm it will be dark enough to view the first quarter Moon, followed a bit later with Saturn, and still later with Jupiter. The brighter wonders beyond the solar system will be also be visible later.
Bob Moler's Ephemeris Blog 