Pirquet (Moon)

Named after Baron Guido von Pirquet - Austrian (spacecraft trajectories) astronaut (1880-1966).

Pirquet is an eroded lunar impact crater that lies to the northwest of the larger crater Levi-Civita on the far side. About three crater diameters to the west is the prominent Tsiolkovskiy. To the north-northeast is Denning. The rim and interior are marked by a number of small 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.