Geological Chronicle
Julius Caesar is a lava-flooded lunar impact crater spanning 84.72 kilometers in diameter near the western margin of Mare Tranquillitatis. Located directly southeast of the crater Manilius on Mare Vaporum and west of the rounded Sosigenes, the structure exhibits a low, irregular, and heavily worn wall. A number of crater remnants overlap the rim along its southern and northeastern edges.
The interior floor of the crater is relatively level, especially across its southwestern half, and a low ridge crosses the northeastern section. Across the interior, the northern half has a lower albedo than the south, leading the observer T. W. Webb to describe the formation as a very dark enclosure. The floor was most likely covered or modified by ejecta from the impact that created the Imbrium basin.