What is "sosigenes"

There were several historical figures called Sosigenes:

• Sosigenes of Alexandria, an astronomer consulted by Julius Caesar for the design of the Julian calendar.
• Sosigenes the Peripatetic, who was a peripatetic philosopher living at the end of the 2nd century and the tutor of Alexander of Aphrodisias.

See also: Sosigenes (crater)

Sosigenes is a lunar impact crater on the west edge of Mare Tranquillitatis. It lies to the east of the large walled plain Julius Caesar. The crater rim has a high albedo, making it relatively bright. It has a small central rise at the midpoint of the floor.

To the east on the mare is a formation of parallel rilles designated the Rimae Sosignes. These follow a course to the north, and have a length of about 150 kilometers. The small, bowl-shaped crater Sosignes A lies across one of these rilles.