Ryder (Moon)

Named after Graham Ryder - United Kingdom-born, American geologist (1949-2002).

Ryder is a crater on the far side. It is located in a patch of higher albedo surface material to the east of the larger Roche–Pauli crater pair. The name for this crater was officially approved at the IAU general assembly in 2006. This circular-rimmed crater lies along the eastern rim of a larger formation that is most likely the remains of an old, worn impact. (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.