Sulpicius Gallus is a small, bowl-shaped lunar

Moon

The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

 crater

Impact crater

In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 that lies near the southwestern edge of the Mare Serenitatis

Mare Serenitatis

Mare Serenitatis is a lunar mare that sits just to the east of Mare Imbrium on the Moon.It is located within the Serenitatis basin, which is of the Nectarian epoch. The material surrounding the mare is of the Lower Imbrian epoch, while the mare material is of the Upper Imbrian epoch...

. About 10 kilometers to the south and east is the Montes Haemus

Montes Haemus

Montes Haemus is a curving range of mountains that forms the southwestern edge of the Mare Serenitatis basin on the Moon. They form a less prominent mirror image of the Montes Apenninus range to the west, and curve up to nearly join at the northern end. The eastern edge terminates with the...

 range that forms the edge of the Serenitatis basin. This crater has a relatively high albedo

Albedo

Albedo , or reflection coefficient, is the diffuse reflectivity or reflecting power of a surface. It is defined as the ratio of reflected radiation from the surface to incident radiation upon it...

, 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

Rille

Rille is typically used to describe any of the long, narrow depressions in the lunar surface that resemble channels. Typically a rille can be up to several kilometers wide and hundreds of kilometers in length...

system designated the Rimae Sulpicius Gallus. These extend to the northwest for a distance of about 90 kilometers, curving and branching out to follow the edge of the mare.

Satellite craters

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.

Sulpicius Gallus	Latitude	Longitude	Diameter
A	22.1° N	8.9° E	4 km
B	18.0° N	13.0° E	7 km
G	19.8° N	6.3° E	6 km
H	20.6° N	5.7° E	5 km
M	20.4° N	8.7° E	5 km