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Deimos (/ ˈ d aɪ m ə s /; systematic designation: Mars II) [11] is the smaller and outer of the two natural satellites of Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 mi) and takes 30.3 hours to orbit Mars. [5] Deimos is 23,460 km (14,580 mi) from Mars, much farther than Mars's other moon, Phobos. [12]
In Hesiod's Theogony, Phobos is the son of Ares and Aphrodite, and the sibling of Deimos and Harmonia. [4] He mainly appears in an assistant role to his father and causes disorder in battle. [ citation needed ] In the Iliad , he accompanied his father into battle along with the goddess Eris (discord) and his brother Deimos (Dread).
Compared to the Earth's Moon, the moons Phobos and Deimos are small. Phobos has a diameter of 22.2 km (13.8 mi) and a mass of 1.08 × 10 16 kg, while Deimos measures 12.6 km (7.8 mi) across, with a mass of 1.5 × 10 15 kg.
Phobos is named after the Greek god of fear and panic, who is the son of Ares (Mars) and twin brother of Deimos. Phobos is a small, irregularly shaped object with a mean radius of 11 km (7 mi). It orbits 6,000 km (3,700 mi) from the Martian surface, closer to its primary body than any other known natural satellite to a planet.
Phobos also takes only 7 hours 39 minutes to orbit Mars, while a Martian day is 24 hours 37 minutes long, meaning that Phobos can create two eclipses per Martian day. These are annular eclipses, because Phobos is not quite large enough or close enough to Mars to create a total solar eclipse. The highest resolution, highest frame rate video of a ...
In the Shield of Herakles, Phobos and Deimos accompany Ares into battle and remove him from the field once Herakles injures him. [6] The poet Antimachus, in a misrepresentation of Homer's account, portrays Deimos and Phobos as the horses of Ares. [7] In Nonnus' Dionysiaca, Zeus arms Phobos with lightning and Deimos with thunder to frighten ...
The Phobos program (Russian: Фобос, Fobos, Greek: Φόβος) was an uncrewed space mission consisting of two probes launched by the Soviet Union to study Mars and its moons Phobos and Deimos. Phobos 1 was launched on 7 July 1988, and Phobos 2 on 12 July 1988, each aboard a Proton-K rocket. [1] Phobos 1 suffered a terminal failure en route ...
Phobos AND DeimOs Retroreflector Array (PANDORA) is a compact passive laser retroreflector device on the PADME spacecraft that would be used as a laser ranging time-of-flight target for a laser communication system on Mars (possibly on board NASA's Mars 2020 rover) to conduct technology demonstrations of laser communication through the martian ...