Ephemeris Star Charts – May 2023

Contents:

Monthly Star Chart s for Northern Michigan (about 45° North)
Twilight ranges for the Grand Traverse Area
Monthly star chart for the Southern Hemisphere

The charts contain the entire dome of the sky as seen from around 45 degrees north latitude and at the dates and times for the locations listed below.

Planet positions are plotted for the 15th of the month. The moon is not shown. To track the planet positions at weekly intervals go to my Ephemeris Blog for my Wednesday posting at bobmoler.wordpress.com.

The charts contain the entire dome of the sky as seen from around 45 degrees north latitude and at the dates and times for the locations listed below.

May Evening Star Chart

Date	Grand Traverse region, Michigan - Eastern Time
1^st	12:00 am EDT
8^th	11:30 pm EDT
15^th	11:00 pm EDT
22^nd	10:30 pm EDT
29^th	10:00 pm EDT

May Morning Star Chart

For early birds I’m including a morning star chart too, which shows the stars we’ll see in the evening 4 months from now.

Date	Grand Traverse region, Michigan - Eastern Time
1^st	5:00 am EDT
8^th	4:30 am EDT
15^th	4:00 am EDT
22^nd	3:30 am EDT
29^th	3:00 am EDT

If you want to convert the above times for your locality in North America click here.

The outer edge of the chart is the horizon with the compass points marked. The chart is oriented as one is looking south. The constellation utlines in magenta are those of the Zodiac. The magenta line is the ecliptic, the path of the sun. The white line that passes through the east and wEDT compass points is the celestial equator, above the earth's equator. The white lines that cross in the north at the north celEDTial pole are major right ascension lines and are like meridians on the earth.

All constellations shown have the standard three letter abbreviation. The constellation abbreviations, names and bright star names are found here.

Also on the sky dome are helps to locate other stars and constellations from the Big Dipper, and asterisms.

The arrow from the pointer stars of the Big Dipper to Polaris the North Star, near the north celestial pole.
Leaky Big Dipper drips on Leo
Follow the arc of the handle of the Big Dipper to Arcturus,
and Spike to Spica
The Summer Triangle is in red
LyrR –Eta Aquariid Meteor Shower Radiant on the night of the peak activity May 5th

Twilight, Astronomical and Nautical

			EDT
	Morning	Twilight	Evening	Twilight	Dark	Night	Moon
Date	Astro.	Nautical	Nautical	Astro.	Start	End	Illum.
2023-05-01	4h41m	5h26m	22h02m	22h46m	-	-	0.87
2023-05-02	4h39m	5h24m	22h03m	22h48m	-	-	0.93
2023-05-03	4h37m	5h22m	22h05m	22h50m	-	-	0.97
2023-05-04	4h35m	5h20m	22h06m	22h52m	-	-	1.00
2023-05-05	4h33m	5h19m	22h08m	22h54m	-	-	1.00
2023-05-06	4h31m	5h17m	22h10m	22h56m	-	-	0.97
2023-05-07	4h29m	5h15m	22h11m	22h58m	22h58m	23h48m	0.93
2023-05-08	4h27m	5h14m	22h13m	23h00m	23h00m	-	0.85
2023-05-09	4h24m	5h12m	22h14m	23h02m	23h02m	0h58m	0.76
2023-05-10	4h22m	5h10m	22h16m	23h04m	23h04m	1h56m	0.66
2023-05-11	4h20m	5h09m	22h17m	23h06m	23h06m	2h42m	0.55
2023-05-12	4h18m	5h07m	22h19m	23h08m	23h08m	3h17m	0.43
2023-05-13	4h16m	5h06m	22h20m	23h10m	23h10m	3h45m	0.32
2023-05-14	4h14m	5h04m	22h22m	23h12m	23h12m	4h08m	0.22
2023-05-15	4h12m	5h03m	22h23m	23h14m	23h14m	4h12m	0.14
2023-05-16	4h10m	5h01m	22h25m	23h16m	23h16m	4h10m	0.07
2023-05-17	4h09m	5h00m	22h26m	23h18m	23h18m	4h09m	0.02
2023-05-18	4h07m	4h58m	22h28m	23h20m	23h20m	4h07m	0.00
2023-05-19	4h05m	4h57m	22h29m	23h22m	23h22m	4h05m	0.00
2023-05-20	4h03m	4h56m	22h31m	23h23m	23h23m	4h03m	0.03
2023-05-21	4h01m	4h54m	22h32m	23h25m	23h51m	4h01m	0.07
2023-05-22	3h59m	4h53m	22h34m	23h27m	-	3h59m	0.12
2023-05-23	3h58m	4h52m	22h35m	23h29m	0h43m	3h58m	0.20
2023-05-24	3h56m	4h51m	22h36m	23h31m	1h26m	3h56m	0.28
2023-05-25	3h54m	4h49m	22h38m	23h33m	1h59m	3h54m	0.37
2023-05-26	3h53m	4h48m	22h39m	23h35m	2h26m	3h53m	0.46
2023-05-27	3h51m	4h47m	22h40m	23h37m	2h48m	3h51m	0.55
2023-05-28	3h49m	4h46m	22h42m	23h38m	3h07m	3h49m	0.65
2023-05-29	3h48m	4h45m	22h43m	23h40m	3h25m	3h48m	0.74
2023-05-30	3h47m	4h44m	22h44m	23h42m	3h42m	3h47m	0.82
2023-05-31	3h45m	4h43m	22h45m	23h44m	-	-	0.90

The above was created by the calendar function of Cartes du Ciel (Sky Charts)

Monthly Evening Star Chart for Observers in the Southern Hemisphere

The chart contains the entire dome of the sky as seen from around 26 degrees south latitude at 2 hours after sunset on the 15th of the month.

Planet positions are also plotted for the 15th of the month. The moon is not shown. The Magellanic Clouds, which are satellite galaxies of the Milky Way. The Large Magellanic Cloud is located in the constellation Dorado (Dor) the Flying Fish. The Small Magellanic Cloud is located in the constellation of Tucana (Tuc) the Toucan.

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Updated 04/30/23