Ephemeris Star Charts – October 2018

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.

October Evening Star Chart

Date	Grand Traverse region, Michigan - Eastern Time
1st.	10:00 p.m. EDT
8th.	9:30 p.m. EDT
15th.	9:00 p.m. EDT
22nd.	8:30 p.m. EDT
29th.	8:00 p.m. EDT

October Morning Star Chart

For early birds I’m including a morning star chart too, which shows the stars we’ll see in the evening 3 months from now.

Date	Grand Traverse region, Michigan - Eastern Time
1st.	7:00 a.m. EDT
8th.	6:30 a.m. EDT
15th.	6:00 a.m. EDT
22nd.	5:30 a.m. EDT
29th.	5:00 a.m. 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 outlines 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 west compass points is the celestial equator, above the earth's equator. The white lines that cross in the north at the north celestial pole are major right ascension lines and are like meridians on the earth.

All constellations shown have the standard three letter abbreviation. Not all constellations are shown, faint and small ones were deleted for overall clarity. 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.
Follow the arc of the handle of the Big Dipper to Arcturus.
The Summer Triangle is shown in red. On the morning star chart.

Twilight

			Time zone=EDT
	Morning twilight		Evening twilight		Dark night		Moon
Date	Astronomical	Nautical	Nautical	Astronomical	Start	End	Illum.
2018-10-01	6h08m	6h42m	20h29m	21h03m	21h03m	23h56m	0.61
2018-10-02	6h09m	6h44m	20h27m	21h01m	21h01m	-	0.49
2018-10-03	6h11m	6h45m	20h25m	20h59m	20h59m	0h55m	0.37
2018-10-04	6h12m	6h46m	20h23m	20h57m	20h57m	2h02m	0.26
2018-10-05	6h13m	6h47m	20h22m	20h56m	20h56m	3h14m	0.16
2018-10-06	6h15m	6h49m	20h20m	20h54m	20h54m	4h28m	0.08
2018-10-07	6h16m	6h50m	20h18m	20h52m	20h52m	5h43m	0.03
2018-10-08	6h17m	6h51m	20h16m	20h50m	20h50m	6h17m	0
2018-10-09	6h18m	6h52m	20h14m	20h48m	20h48m	6h18m	0
2018-10-10	6h20m	6h53m	20h13m	20h46m	20h46m	6h20m	0.03
2018-10-11	6h21m	6h55m	20h11m	20h45m	20h56m	6h21m	0.08
2018-10-12	6h22m	6h56m	20h09m	20h43m	21h31m	6h22m	0.15
2018-10-13	6h23m	6h57m	20h07m	20h41m	22h11m	6h23m	0.24
2018-10-14	6h25m	6h58m	20h06m	20h39m	22h55m	6h25m	0.33
2018-10-15	6h26m	7h00m	20h04m	20h38m	23h44m	6h26m	0.43
2018-10-16	6h27m	7h01m	20h02m	20h36m	-	6h27m	0.52
2018-10-17	6h28m	7h02m	20h01m	20h35m	0h37m	6h28m	0.62
2018-10-18	6h30m	7h03m	19h59m	20h33m	1h33m	6h30m	0.71
2018-10-19	6h31m	7h04m	19h58m	20h31m	2h32m	6h31m	0.8
2018-10-20	6h32m	7h06m	19h56m	20h30m	3h32m	6h32m	0.87
2018-10-21	6h33m	7h07m	19h55m	20h28m	4h34m	6h33m	0.93
2018-10-22	6h34m	7h08m	19h53m	20h27m	5h37m	6h34m	0.93
2018-10-23	6h36m	7h09m	19h52m	20h25m	-	-	0.97
2018-10-24	6h37m	7h10m	19h50m	20h24m	-	-	1
2018-10-25	6h38m	7h12m	19h49m	20h22m	-	-	1
2018-10-26	6h39m	7h13m	19h47m	20h21m	-	-	0.97
2018-10-27	6h40m	7h14m	19h46m	20h19m	20h19m	21h01m	0.92
2018-10-28	6h42m	7h15m	19h44m	20h18m	20h18m	21h51m	0.85
2018-10-29	6h43m	7h17m	19h43m	20h17m	20h17m	22h48m	0.75
2018-10-30	6h44m	7h18m	19h42m	20h15m	20h15m	23h53m	0.64
2018-10-31	6h45m	7h19m	19h40m	20h14m	20h14m	-	0.53

The above times calculated 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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Questions or comments, send an email to: bob@bjmoler.org

Updated 10/01/18