Réaumur (crater)

Content sourced from Wikipedia, licensed under CC BY-SA 3.0.

Réaumur is a 51-km-wide, 1.3-km-deep crater on the southern edge of Sinus Medii. It’s the remains of a lunar impact and is named after the French scientist René de Réaumur. The rim is heavily worn; the northern part is low ridges, and the southern rim has small crater indentations. The interior floor is smooth and flat with no notable features. The broken northern rim crosses a long rille called Rima Oppolzer (about 110 km long, from NNE to SSW). To the east is another rille, Rima Réaumur, and farther east is the small Seeliger. Nearby craters include Oppolzer to the northwest, Hipparchus to the southeast, Flammarion to the west, Gyldén to the south, and Ptolemaeus farther south-southwest. On maps, labels are placed on the side of Réaumur’s midpoint closest to the feature.