Donner (crater)

Donner is a lunar impact crater on the far side of the Moon. It is located just to the northeast of the Mare Australe, behind the southeastern limb of the Moon.^[2] To the northeast is the larger Titius formation,^[3] while the basalt-flooded Abel lies to the southwest.

This crater has a moderately eroded outer rim, and several small and tiny craterlets lie along the edge. A joined pair of small craters lie across the southern rim and inner wall, including the Copernican period crater Donner M.^[4] An unnamed, crater-like feature with about the same diameter as Donner is attached to the northern outer rim. The structure along the inner wall has been softened and rounded by a long history of minor impacts.

The interior floor is relatively level, and is pock-marked by multiple tiny craterlets. There is a curving ridge in the southern part of the floor that is attached to the inner wall, and possibly forms the remnant of a small crater rim.^[5]: 100

This formation is named after Finnish astronomer Anders Donner (1854-1938).^[6] Its designation was formally adopted by the International Astronomical Union in 1970.^[1]