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S
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1518
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W
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538 km
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''Unknown''
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161
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is an enormous
Impact Crater located in the southern
Hemisphere on the
Far Side of the
Moon . This formation dwarfs the large
Oppenheimer Crater that is located next to the western rim. The crater
Barringer lies across the northern wall. To the southeast is the
Anders Crater , and the
Kleymenov Crater is just to the east of the rim.
The Apollo walled-plain is a double-ringed formation with the inner ring roughly half the diameter of the outer wall. Both the outer wall and the interior have been heavily worn and eroded by subsequent impacts, so that significant parts of the outer and inner walls now consist of irregular and incised sections of mountainous arcs.
The interior floor is covered in a multitude of craters of various sizes. Several of the more notable craters have received names. The
IAU used the
Eponym s of people associated with the Apollo program when designating some of these formations.
Sections of the Apollo crater interior have been resurfaced with
Lava , leaving patches of the floor with a lower
Albedo than the surroundings. There is a large patch of this
Lunar Mare in the middle part of the inner ring, which contains some
Ray System markings. A long stretch of the mare lies along the southern part of the crater. There is also a smaller section near the western rim.
Several craters within the Apollo impact have been named to honor deceased NASA employees.
The
Dryden Crater is attached to the west-northwestern exterior of the inner ring.
Chaffee is a similar-sized crater that lies partly across the southwest section of the inner ring. In the southeast part of the outer crater is the
Borman Crater . Inside the inner ring are the
Resnik ,
McAuliffe , and
Onizuka Craters , and the
Jarvis -
McNair crater pair. The
Smith Crater lies across the northern part of the inner ring.
Three of the crater names include the respective astronaut's first initials to distinguish them from the
Anderson ,
Brown and
Clark craters.
