Deimos (pronounced /ˈdaɪməs/ DYE-məs; also /ˈdiːməs/ DEE-məs, as in Greek Δείμος), is the smaller and outer of Mars’ two moons (the other being Phobos). It is named after Deimos, a figure representing dread in Greek Mythology. Its systematic designation is Mars II. Deimos was discovered by Asaph Hall, Sr. 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).[6][7][8][9] Hall also discovered Phobos at the same time, after deliberately searching for Martian moons. #Deimos #Jeroen_Hut #Mars #Moon #Phobos #Space
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