Siedentopf (Moon)

Named after Heinrich Siedentopf - German astronomer (1906-1963).

Siedentopf is a worn impact crater on the far side. It lies to the east-southeast of the larger crater Vernadskiy. Farther to the south is Hoffmeister. The northwestern section of the crater rim has been damaged, but the remainder of the rim is only moderately worn. (wikipedia entry)

A crater is a circular depression likely created by an impact event. On the Moon they are named after deceased scientists, polar explorers, astronauts or cosmonauts.