Seneca (Moon)

Named after Lucius Annaeus Seneca - Roman philosopher, natural scientist (4 B.C.- A.D. 65).

Seneca is a lunar crater that is located towards the east-northeastern limb, less than one crater diameter to the north of Plutarch. To the northwest is the crater Hahn, and due north lies the large walled plain Gauss. This crater has been heavily eroded by impacts, with an outer rim that has been distorted and overlain by several small craters. It appears roughly diamond-shaped as viewed from above, although it is heavily foreshortened when seen from the Earth. (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.