In the Solar System · tracked live
Deimos
The smaller and farther of Mars's moons, about 15 by 12 by 11 kilometres and smoothed by a blanket of dust that fills its craters. It goes round in thirty hours, only a little slower than Mars turns, so it creeps across the Martian sky and stays up for more than two days at a time; from the surface it is a bright star rather than a disc. Where both moons came from - captured asteroids, or debris from an impact on Mars - is still argued.
- Radius
- 6 km
- Around the equator
- 39 km
- From the Sun
- 234,743,968 km (+204,941 km/d)
- From the Earth
- 239,681,513 km (-1,074,919 km/d)
- A signal takes
- 13 min
- Goes round
- Mars
- Placed to within
- 39 km
Distances and speed are computed from JPL Horizons trajectories and are true of the date below, changing at the rate beside each.
Everything the map shows is worked out in your browser from published orbital data - nothing on it is a stored picture of where things were.