Home > Constellations, Ephemeris Program, Mythology > 04/25/2016 – Ephemeris – Arcas and Callisto

04/25/2016 – Ephemeris – Arcas and Callisto

April 25, 2016

Ephemeris for Monday, April 25th.  The Sun rises at 6:41.  It’ll be up for 13 hours and 59 minutes, setting at 8:40.   The Moon, 3 days past full, will rise at 11:56 this evening.

Appearing mid way up the sky in the east at 10 p.m. is the kite shaped constellation of Boötes the herdsman.  The bright star Arcturus is at the bottom of the kite, pointed to by the arc of the handle of the Big Dipper, above it.  In one story Boötes represents a young hunter named Arcas, son of Callisto, a beautiful young lady who had the misfortune of being loved by Zeus the chief of the Greek gods.  Zeus’ wife Hera, found out about the affair, and since she couldn’t punish Zeus, turned the poor woman into an ugly bear.  Arcas, unaware of the events surrounding his mother’s disappearance was about to kill the bear when Zeus intervened and placed them both in the sky to save her.  To this day Boötes continues to chase the great bear Ursa Major around the sky each night.

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


Arcas and Callisto

Bootes and Ursa Major aka Arcas chasing Callisto around the pole of the sky. Created using Stellarium.

Arcas and Callisto woodcut

Arcas about to slay the bear by the 17th century artist Baur. Source: University of Virginia Electronic Text Center

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