Home > Constellations, Ephemeris Program, Mythology, Observing > Ephemeris: 10/21/2025 – Finding Andromeda

Ephemeris: 10/21/2025 – Finding Andromeda

October 21, 2025

This is Ephemeris for Tuesday, October 21st. Today the Sun will be up for 10 hours and 41 minutes, setting at 6:47, and it will rise tomorrow at 8:07. The Moon is new today, and won’t be visible.

Tonight at 9:00 PM Saturn is in the southeast, with the Great Square of Pegasus above and to the left. Off the leftmost star of the Great Square, called Alpheratz, are two curved lines of stars to the left and a bit below, and slightly diverging. They might be mistaken for the hind legs of the horse, which is flying upside down. It’s another constellation, that of Andromeda the Princess, daughter of Cassiopeia, the W shaped constellation to the upper left. Andromeda was rescued by hero Perseus which is another constellation left of her, which we’ll get to later on this week. Andromeda’s claim to scientific fame is the large galaxy located there, the Great Andromeda Galaxy, probably the farthest thing one can spot with the naked eye.

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

Animated chart for locating Andromeda
Locating Andromeda in this animated finder chart is by using the Great Square of Pegasus as the starting point. The position of the constellation is for 9 PM in mid to late October 2025. Created using Stellarium, LibreOffice Draw, and GIMP.

Andromeda is part of the Great Star Story of Autumn. My take on it is linked Here.

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