Archive for January 15, 2018

01/15/2018 – Ephemeris – A river in the sky

January 15, 2018 1 comment

Ephemeris for Martin Luther King Day, Monday, January 15th. The Sun will rise at 8:16. It’ll be up for 9 hours and 11 minutes, setting at 5:28. The Moon, 1 day before new, will rise at 7:49 tomorrow morning.

There is a long and sinuous constellation that’s part of the winter sky. It is Eridanus, which depicts a river. The river starts near the lower right corner of Orion, near the bright star Rigel and flows to the right then down near the southern horizon, then it meanders below the horizon. One has to travel to the far southern United States or even farther south to see the southern terminus of the river, the bright star Achernar. Writers over the ages have seen here the Nile and the earth circling river Ocean of the flat earth days. One of its stars is close to us and famous. It’s Omicron 2 Eridani a triple star system and the fictional home to Mr. Spock and other Vulcans of the Star Trek franchise. No real planet has been found there. Yet.

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



An animation of the constellation Eridanus which is a river that flows from Rigel in Orion to the star Achernar below our southern horizon at latitude 45 degrees north. Create using Stellarium and GIMP.

Vulcan's home star

Keid, Omicron 2 Eridani, fictional home of Mr. Spock. Created using Stellarium.