Deimos

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Deimos
Deimos is the smaller and outer of the two natural satellites of the planet Mars, the other being Phobos. Deimos has a mean radius of 6.2 km and takes 30.3 hours to orbit Mars. In Greek mythology, Deimos was the twin brother of Phobos and personified terror. Deimos (moon) - Wikipedia, the free encyclopedia
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Additional Information

Short Description Deimos is the smaller and outer of the two natural satellites of the planet Mars, the other being Phobos. Deimos has a mean radius of 6.2 km and takes 30.3 hours to orbit Mars. In Greek mythology, Deimos was the twin brother of Phobos and personified terror. Deimos (moon) - Wikipedia, the free encyclopedia
Discovered by Asaph Hall
Discovery date 12 August 1877
Type Moon
AddInfo Mars II
Satellite of Mars
Orbit Prograde
Rotation Synchronous
Apoapsis 05 23 470.9 km
Periapsis 05 23 455.5 km
Semi-major axis 05 23 463.2 km | 6.92 Mars radii
Distance from Sun 01 1.523 679 au /2
Eccentricity 0.000 33
Orbital period 1.263 days | 30.312 hour
Orbital speed 01 1.351 km/s
Inclination to the ecliptic 027.58°
Inclination to the equator 000.93°
Diameter/Size 02 12.6 km
Dimensions 15 × 12.2 × 11 km
Mass 1015×1.476 2 kg
Density 01 1.471 g/cm3
Surface gravity  0.003 m/s2
Escape velocity 01 5.556 m/s
Rotation period 30.312 hour
Axial tilt
Albedo geometric 0.068
Temperature mean 02 233 K
Apparent magnitude 12.4–15.7
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