Ellerman (Moon)

Named after Ferdinand Ellerman - American astronomer (1869-1940).

Ellerman is a lunar crater on the far side. It lies within the outer blanket of ejecta that surrounds the Mare Orientale impact basin, and is located to the west of the Montes Cordillera mountain range. To the northwest is the larger crater Gerasimovich. Probably due to its location amidst rugged surroundings, the otherwise circular rim of this crater is somewhat irregular and polygonal in shape. (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.