Casatus (Moon)

Named after Casati, Paolo Casatus - Italian mathematician (1617-1707).

Casatus is a lunar impact crater that is located near the southern limb. The north-northeast rim of the crater overlies a portion of the slightly larger crater Klaproth. Along the western rim, Casatus A intrudes somewhat into the interior, producing an inward-bowing rim. To the southeast is Newton. (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.