Sommerfeld (crater)

Sommerfeld

Clementine mosaic
Coordinates	65°12′N 162°24′W / 65.2°N 162.4°W / 65.2; -162.4
Diameter	169 km
Depth	Unknown
Colongitude	165° at sunrise
Eponym	Arnold J. Sommerfeld

Sommerfeld is a sizable lunar impact crater situated in the far northern latitudes of the Moon. Located on the far side, it can only be observed from orbit. Positioned to the south of Sommerfeld is Rowland, a crater about the same size as Sommerfeld. Southeast of Sommerfeld lies the huge walled plain Birkhoff.

This crater is classified as a walled plain on the lunar surface, characterized by a relatively flat interior encircled by a ring mountain. Its outer rim exhibits moderate erosion, retaining traces of a terrace structure albeit softened and rounded. Along the rim edge and inner wall to the south and southeast, several small craterlets are present. Additionally, a merged pair of small craters is attached to the southern outer rim. The inner wall appears slightly wider along the eastern side, possibly due to deposits of ejecta from nearby impacts.

The interior floor of Sommerfeld consists of a nearly level plain, likely smoothed out by deposits of materials over time. Some small craters are observed on the eastern edge of the interior. Notably, there is no central peak complex, with only a small hill present at the midpoint.