Phobos is a small, irregular and rocky body. It has numerous craters, the main one of which is named Stickney. The impact that caused this huge crater could have almost shattered the moon.
Phobos was viewed by the Curiousity craft in 2013.
- Dimensions: 26.8 × 22.4 × 18.4 km
- Mass: 1.072×1016 kg
- Semimajor Axis: 9,377.2 km
- Orbital Period: 7 h 39.2 min
- Inclination: 1.093° (To Mars' equator)
- Orbital Eccentricity: 0.0151
- Discovered: 1877
- Host Planet: Mars