is a small, bowl-shaped lunar crater
that lies near the southwest edge of the Mare Serenitatis
. About 10 kilometers
to the south and east is the Montes Haemus
range that forms the edge of the mare
. This crater has a relatively high albedo
, with a sharp-edged rim that displays little appearance of wear. There is a small rise at the mid-point. Recent deposits of highland material have been observed within the crater interior.
To the northwest is a rille system designated the Rimae Sulpicious Gallus. These extend to the northwest for a distance of about 90 kilometers, curving and branching out to follow the edge of the mare.
By convention these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Sulpicius Gallus crater.