Satellite |
Distance(km) |
Orbital Period (days) |
Radius (km) |
Mass (kg) |
Density (kg/m^{3}) |

Phobos | 9380 | 0.3189 | 14 x 11 x 9 | 1.1 x 10^{16} |
2200 |

Deimos | 23,460 | 1.262 | 8 x 6 x 6 | 1.8 x 10^{15} |
1700 |

When a satellite's radius or diameter are given as a combination of numbers, it indicates that the object is not spherical, and these numbers represent its major dimensions (height, width and breadth).