Archive for September 19, 2019

09/19/2019 – Ephemeris – The celestial upside down flying horse

September 19, 2019 Comments off

Ephemeris for Thursday, September 19th. Today the Sun will be up for 12 hours and 20 minutes, setting at 7:46, and it will rise tomorrow at 7:27. The Moon, 2 days before last quarter, will rise at 10:42 this evening.

Rising and almost half way up the sky in the east at as it gets dark around 9 p.m. can be found one of the great autumn constellations: Pegasus the flying horse of Greek myth. Its most visible feature is a large square of four stars, now standing on one corner. This feature, called the Great Square of Pegasus, represents the front part of the horse’s body. The horse is quite aerobatic, because it is seen flying upside down. Remembering that fact, the neck and head is a bent line of stars emanating from the right corner star of the square. Its front legs can be seen in a gallop extending to the upper right from the top star of the square. From the left star extend, not hind legs but the constellation of Andromeda, rescued with the help of Pegasus.

For my retelling of the Greek myth that links these two and other autumn constellations click here.

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


Pegasus-Andromeda finder

Pegasus & Andromeda animated finder chart for 9 p.m. September 19, 2019. Click on the iamge to enlarge. Created using Stellarium and GIMP.