Phobos
| Mean Distance from Mars | 9,378 km (5,827 miles) |
| Orbital Period around Mars | 0.319 Earth days |
| Mean Diameter | 22.2 km (13.8 miles) |
| Year Discovered | 1877 |
Deimos
| Mean Distance from Mars | 23,459 km (14,577 miles) |
| Orbital Period around Mars | 1.26244 Earth days |
| Mean Diameter | 12.6 km (7.83 miles) |
| Year Discovered | 1877 |
Original images located on various NASA websites including: http://photojournal.jpl.nasa.gov/index.html and http://nssdc.gsfc.nasa.gov/photo_gallery/