Berosus (Moon)

Named after Berosus the Chaldean - Babylonian astronomer (unkn-c. 250 B.C.).

Berosus is a lunar crater that is located in the northeast part , less than one crater diameter northwest of Hahn. Further to the east-northeast is the large crater Gauss, and to the north-northwest lies Bernoulli. Because of its location, this crater appears foreshortened when viewed from the Earth. The rim of this crater is roughly circular, but with some angularity along the eastern edge. (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.