Mars II
| Deimos Statistics | |
|---|---|
| Discovered by | Asaph Hall |
| Date of discovery | 1877 |
| Mass (kg) | 1.8e+15 |
| Mass (Earth = 1) | 3.0120e-10 |
| Radius (km) | 7.5x6.1x5.5 |
| Radius (Earth = 1) | 1.1759e-03 |
| Mean density (gm/cm^3) | 1.7 |
| Mean distance from Mars (km) | 23,460 |
| Rotational period (days) | 1.26244 |
| Orbital period (days) | 1.26244 |
| Mean orbital velocity (km/sec) | 1.36 |
| Orbital eccentricity | 0.00 |
| Orbital inclination (degrees) | 0.9-2.7 |
| Escape velocity (km/sec) | 0.0057 |
| Visual geometric albedo | 0.07 |
| Magnitude (Vo) | 12.40 |