Coblentz (Moon)

Named after William Weber Coblentz - American physicist, astronomer (1873-1962).

Coblentz is a small lunar impact crater on the far side , to the south of the much larger crater Bolyai. This crater retains a circular rim, but it has been worn by impact erosion. This is particularly so at the southern end where an irregular gap exists in the rim. The interior floor is featureless save for several tiny craterlets. (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.