Rankine (Moon)

Named after William John Macquorn Rankine - Scottish physicist, engineer (1820-1872).

Rankine is a small lunar impact crater near the eastern limb. It lies on the southern floor of the satellite crater Maclaurin B, a 43-kilometer-diameter feature which is located to the southeast of Maclaurin. To the east is the crater Gilbert, and directly to the south is von Behring. This is an insignificant, bowl-shaped formation with a negligible interior floor. (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.