01. Phobos Moon Data Mass (kg) 1.08e+16 Radius (km) 13.5 x 10.8 x 9.4 Density (gm/cm3) 2.0 Distance from Mars (km) 9,380 Period of rotation (days) 0.31910 Period of orbit (days) 0.31910 Orbital velocity (km/sec) 2.14 Eccentricity of orbit 0.01 Inclination of orbit (°) 1.0 surface gravity (m/sec2) 3.72 Escape velocity (km/sec) 0.0103 Visual albedo 0.06 Visual magnitude 11.3 Discovered: 1877 A.Hall
Mars Moons
02. Deimos Moon Data Mass (kg) 1.8e+15 Radius (km) 7.5 x 6.1 x 5.5 Density (gm/cm3) 1.7 Distance from Mars (km) 23,460 Period of rotation (days) 1.26244 Period of orbit (days) 1.26244 Orbital velocity (km/sec) 1.36 Eccentricity of orbit 0.00 Inclination of orbit (°) 0.9-2.7 Escape velocity (km/sec) 0.0057 Visual albedo 0.07 Visual magnitude 12.40 Discovered: 1877 A.Hall
TOTAL MOONS 2
Orbits of Phobos and Deimos
Moons
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Title: Phobos & Deimos: Moons of The Solar System (2/4) Published: 28 Feb 2012 Duration: 7:52
Named after the Greek gods of fear and dread, Mars's two moons remained undiscovered until the late 19th century. Since the start of the Space Race they've been minor supporting characters in our quest to understand the Red Planet, but an ambitious new mission may be about to move them centre stage. Archive footage appears courtesy of Footagevault.
