Planetary Database/Terran/Mars/Deimos
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==Characteristics== | ==Characteristics== | ||
Deimos is probably an asteroid that was perturbed by [[Planetary Database/Terran/Jupiter|Jupiter]] into an orbit that allowed it to be captured by Mars, though this hypothesis is still in some dispute. Like most bodies of its size, Deimos is highly nonspherical with dimensions of 15×12×10 km. | Deimos is probably an asteroid that was perturbed by [[Planetary Database/Terran/Jupiter|Jupiter]] into an orbit that allowed it to be captured by Mars, though this hypothesis is still in some dispute. Like most bodies of its size, Deimos is highly nonspherical with dimensions of 15×12×10 km. | ||
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Latest revision as of 03:29, 22 March 2009
[edit] The Planetary Database - Terran System - Mars - Deimos
Deimos was discovered by American astronomer Asaph Hall. The names were suggested by Henry Madan (1838–1901), Science Master of Eton, from Book XV of the Iliad, where Ares (the Roman god of Mars) summons Dread (Deimos) and Fear (Phobos).
Deimos was discovered on August 12, 1877 at about 07:48 UTC (given in contemporary sources as "August 11 14:40" Washington mean time using the old astronomical convention of beginning a day at noon, so 12 hours must be added to get the actual local mean time) [1].
