Deimos is the smaller and outermost of the two natural satellites of the planet Mars, the other being Phobos. Deimos has a mean radius of 6.2 km and takes 30.3 hours to orbit Mars. Deimos is 23,460 km from Mars, much further than Mars's other moon, Phobos.

Radius: 3.8525 mi

Orbital period: 30 hours

Distance to Earth: 48.34 million mi

Gravity: 0.003 m/s²

Surface area: 495.1548 km²; (97.0755 µEarths)

Did you know: Deimos's diameter is about 12.6 km (7.8 mi).