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Planet Mars Moons: Phobos
Mars is the fourth of nine planets in our solar system.
For a listing of other moons, see Moons of the planets.
| Phobos Moon Facts |
| 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 |
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This moon can be viewed in most telescopes.
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