Phobos

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Phobos
Phobos is the larger and innermost of the two natural satellites of Mars, the other being Deimos. Phobos is named after the Greek god Phobos, a son of Ares (Mars) and Aphrodite (Venus) which was the personification of Horror. Phobos orbits 6,000 km from the Martian surface, closer to its primary body than any other known planetary moon. Phobos (moon) - Wikipedia, the free encyclopedia
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Additional Information

Short Description Phobos is the larger and innermost of the two natural satellites of Mars, the other being Deimos. Phobos is named after the Greek god Phobos, a son of Ares (Mars) and Aphrodite (Venus) which was the personification of Horror. Phobos orbits 6,000 km from the Martian surface, closer to its primary body than any other known planetary moon. Phobos (moon) - Wikipedia, the free encyclopedia
Discovered by Asaph Hall
Discovery date 17 August 1877
Type Moon
AddInfo Mars I
Satellite of Mars
Orbit Prograde
Rotation Synchronous
Apoapsis 04 9 517.58 km
Periapsis 04 9 234.42 km
Semi-major axis 04 9 376 km | 2.76 Mars radii
Distance from Sun 01 1.523 679 au /1
Eccentricity 0.015 1
Orbital period 0.318 910 23 day | 7 hour 39.2 min
Orbital speed 01 2.138 km/s
Inclination to the ecliptic 026.04°
Inclination to the equator 001.093°
Diameter/Size 02 22.2 km
Dimensions 27 × 22 × 18 km
Mass 1016×1.065 9 kg
Density 01 1.876 g/cm3
Surface gravity  0.005 7 m/s2
Escape velocity 02 11.39 m/s
Rotation period 0.318 910 23 day | 7 hour 39.2 min
Axial tilt
Albedo geometric 0.071
Temperature mean 03 233 K
Apparent magnitude 11.3–14.8
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