Moon
Phobos
Moon of Mars
The doomed moon of Mars
A small, lumpy moon that orbits Mars three times a day. It is slowly spiralling inward and will eventually break apart or crash into Mars in tens of millions of years.
Key facts
Distance
9,376 km from Mars' centre
Size
27 × 22 × 18 km
Orbital period
7 h 39 min
Discovered
1877, Asaph Hall
Orbits
Mars
Did you know
- From Mars it rises in the west and sets in the east.
- Its largest crater, Stickney, is about 9 km across.
- It may be captured asteroid or debris from an impact.
