Astronomical specifications:
| Discovery | 12 Aug 1877 by Hall |
| Orbital characteristics: | |
| Distance from Mars | km |
| Aphelion | (106 km) |
| Perihelion | (106 km) |
| Inclination | deg |
| Eccentricity | |
| Orbital periode rond Mars | 1.262 days |
| Main orbital speed | km/s |
| Inclination to Mars equator | deg |
| Number of moons | |
| Rings | |
| Physical characteristics: | |
| Dimensions | km |
| Radius | 6.2 km |
| Surface area | km² |
| Volume | 106 km³ |
| Mass | 1024 kg |
| Density | g/cm³ |
| Equatorial surface gravity | m/s² |
| Escape velocity | km/s |
| Rotation period | days |
| Surface temperature | K |
| Axial tilt | deg |
| Atmospheric composition | |
Image of Deimos taken by the Viking 2 orbiter on October 5, 1977