Sulpicius Gallus ( crater ) Crater characteristics Coordinates 19.6° N , 11.6° E Diameter 12 km Depth 2.2 km Colongitude    349° at sunrise Eponym Gaius Sulpicius Gallus Sulpicius Gallus 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 . 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 crater . 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 References See the reference table for the general listing of literature and web sites that were used in the compilation of this page . `` SMART-1 view of crater Sulpicius Gallus `` , European Space Agency , 2006-07-12 . Retrieved on 2006-07-18 . J.F. Bell III , B. R. Hawke ( 1995 ) . `` Compositional variability of the Serenitatis/Tranquillitatis region of the Moon from telescopic Multispectral Imaging and Spectroscopy `` . Icarus 118 : 51-68 . Categories : Craters on the Moon 19.6 N 11.6 E 12 km 2.2 km 349 Gaius Sulpicius Gallus SMART-1 view of crater Sulpicius Gallus European Space Agency 2006-07-12 http : //www.esa.int/SPECIALS/SMART-1/SEMGV5XAIPE_0.html 2006-07-18 J.F. Bell III , B. R. Hawke Compositional variability of the Serenitatis/Tranquillitatis region of the Moon from telescopic Multispectral Imaging and Spectroscopy Icarus 1995 118 51-68 http : //marswatch.tn.cornell.edu/text/moon.html 