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Revision as of 21:45, 6 October 2007
Deimos is the smaller and outer moon of Mars (the inner moon is Phobos.) Demios is composed of rock rich in carbonaceous material. Although the surface is noticeably smoother than Phobos it is still cratered. The two largest craters each measure about 3 kilometers in diameter.
Deimos' orbit is slightly eccentric (0.0002) with an orbital semi-major axis (apoareion) of 23,460km.[1]
The name Deimos (Dread) comes from Book XV of the Iliad. The name was suggested by Henry Madan (1838–1901)
References
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