Doppelmayer (Moon)

Named after Johann Gabriel Doppelmayer - German mathematician, astronomer (1671-1750).

Doppelmayer is the remains of a lunar crater that lies on the southwest edge of Mare Humorum. To the south-southeast is another flooded crater designated Lee, and to the southeast is Vitello. Just to the east-northeast lies the nearly submerged crater Puiseux. The rim is nearly round, but is worn and eroded. (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.