Deimos (moon)

Deimos (IPA {{IPA|/?da?m?s/}} or {{IPA|/?di?m?s/}}; Greek Δείμος: "Dread"), is the smaller and outermost of Mars' two moons, named after Deimos from Greek Mythology. The adjectival form of the name is, presumably, Deimian.

Discovery

Phobos and Deimos were both 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 Mars) summons Panic (Deimos) and Fear (Phobos).

Related Topics:
Phobos - Asaph Hall - Henry Madan - Eton - Iliad - Ares - Mars - Deimos - Phobos

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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). http://adsabs.harvard.edu//full/seri/AN.../0091//0000013.000.html

Related Topics:
August 12 - 1877 - UTC - August 11 - Washington mean time

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It has been designated Mars II.

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