Sumner (crater)
Encyclopedia
Sumner is a lunar
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

 crater
Impact crater
In the broadest sense, the term impact crater can be applied to any depression, natural or manmade, resulting from the high velocity impact of a projectile with a larger body...

 on the far side of the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...

, beyond the northeastern limb. It is southwest of the larger crater Szilard
Szilard (crater)
Szilard is a damaged lunar crater that lies to the east-northeast of the crater Richardson. It is named after Leo Szilard, the scientist who theorised nuclear chain reactions and famously worked on the atomic bomb during WWII. About a half-crater-diameter to the northwest is the large walled plain...

, and southeast of the twin walled plains Fabry
Fabry (crater)
Fabry is a large lunar crater of the form termed a walled plain. It is located on the far side of the Moon, just beyond the northeastern limb. Parts of this area are sometimes brought into view by the effects of libration, but the terrain is seen from the edge and so not much in the way of detail...

 and Harkhebi
Harkhebi (crater)
Harkhebi is a large lunar crater of the category termed a walled plain. Half of the crater to the north-northwest is overlain by the walled plain Fabry, a large formation in its own right. Attached to the northwestern rim is the much smaller crater Vashakidze...

.

This crater formation has been heavily damaged by a history of impacts, leaving an irregular, battered outer rim. A smaller impact crater has merged into the southern rim; the northern rim is little more than an irregular, arcing range of ridges. The interior is nearly as irregular, and the entire formation is little more than a rugged depression in the surface.

Starting about 30 kilometers to the north of Sumner and progressing to the east-southeast is a long, linear chain of craters that forms an irregular cleft in the surface. This formation is named Catena Sumner after the nearby crater. It progresses to the northeast rim of Harriot A, a satellite crater of Harriot
Harriot (crater)
Harriot is a lunar crater that is located on the far side of the Moon from the Earth. It lies just to the north of the much larger crater Seyfert. To the northeast of Harriot is the crater Cantor. About one and a half crater diameters to the north of Harriot is the eastern end of a crater chain...

.

Satellite craters

By convention, these features are identified on lunar maps by placing the letter on the side of the crater mid-point that is closest to Sumner.
Sumner Latitude Longitude Diameter
G 37.2° N 110.2° E 18 km
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