Lyman (crater)

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Crater characteristics
Coordinates	64.8° S, 163.6° E
Diameter	84 km
Depth	Unknown
Colongitude	160° at sunrise
Eponym	Theodore Lyman

Lyman is a lunar impact crater that lies in the southern hemisphere on the far side of the Moon. It is located to the south of the huge Poincaré walled plain, and to the northeast of the Schrödinger walled plain. To the east-southeast is the larger Minnaert crater.

The rim of Lyman has not been significantly worn and has a well-defined edge and interior features that have not been eroded through impacts. The perimeter is roughly circular with outward bulges along the southern and eastern edges where slumping has occurred. Around much of the interior edge the unconsolidated material has collapsed, forming a ring-shaped pile around the edge of the interior floor. There are a few terraces along parts of the inner wall.

The interior floor of Lyman crater is relatively level with a few minor ridges and a small number of tiny craterlets. At the mid-point of the interior floor is a central peak formation. This consists of a main peak with attached foothills to the north and northeast. This formation of ridges occupies a diameter of over 10 kilometers.