- Firmicus (crater)
lunar crater data
latitude=7.3
N_or_S=N
longitude=63.4
E_or_W=E
diameter=56 km
depth=1.5 km
colong=297
eponym=Firmicus Maternus Firmicus is a lunar crater that lies in the eastern part of the
Moon 's near side, so that fromEarth it appears oval in shape due to foreshortening. It is, however, very nearly circular. The crater is located to the west of theMare Undarum , and northeast of the similar-sized Apollonius crater. To the north of Firmicus are van Albada and Auzout craters. Attached to its northwest rim is the "Lacus Perseverantiae ", a miniaturelunar mare .The most notable aspect of Firmicus is the dark, flat floor. It has a similar
albedo to the surface ofMare Crisium to the north, making it stand out somewhat from its surroundings. The floor has suffered no significant impacts since it was created, although there are undoubtedly many minor impacts across its surface. The outer rim of Firmicus has undergone some erosion, particularly along the northern rim where it is overlaid by a pair of small craterlets.atellite 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 Firmicus crater.
References
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