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N
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1514
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E
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219 km
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''Unknown''
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212
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is a large
Lunar Crater that is located in the
Northern Hemisphere on the
Far Side of the
Moon . It lies to the southwest of the
D'Alembert Walled Plain , an even larger formation. If Campbell were located on the near side of the Moon as seen from the
Earth , it would form one of the largest visible craters, being slightly larger than
Schickard . It is bordered by several craters of note, with
Wiener to the southwest,
Von Neumann just to the south,
Ley overlaying the southeast rim, and
Pawsey to the west.
This formation has been heavily worn and eroded by a history of impacts, leaving a circular rim that is an irregular ring of ridges and peaks. Multiple small craters lie along the rim and the inner wall, as well as across the interior floor. The most notable of these are 'Campbell X' along the northeast inner rim and 'Campbell N' near the southern inner wall.
Much of the inner floor is covered by a multitude of lesser impacts; the exception being a wide patch of the floor that has been resurfaced by
Basalt ic-
Lava . This area has a lower
Albedo than its surroundings, thus appearing dark. It stretches from the center of the Campbell walled plain toward the western rim, and has an irregular perimeter.
There is an unusual crater lying to the south of Campbell and to the west of Von Neumann. This is formed by two or more overlapping craters, the most recent being 'Wiener F', a nearly hexagonal formation with a rugged interior.
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 Campbell crater.
