Tags: Crater.
De Sitter is a lunar crater that is located near the northern limb of the Moon to the north of the Baillaud–Euctemon crater pair. Due to its location this crater appears very foreshortened when viewed from the Earth limiting the detail that can be viewed. The crater also receives sunlight at a low angle when it is on the sunlit side.This crater forms part of an unusual three-crater cluster with De Sitter overlying the northeast rim of De Sitter L and the southern rim of De Sitter M.