Oken (Moon)

Named after (Okenfuss), Lorenz - German biologist, physiologist (1779-1851).

Oken is a lunar crater near the southeastern limb. It is normally visible from the Earth, but is foreshortened and within the region of the surface that is subject to libration. To the south and east of this feature is the broad, uneven Mare Australe, which extends to the far side. The interior of this crater has become flooded by basaltic lava, producing a nearly level, featureless surface with a low albedo. (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.