Mars has two moons, Phobos and Deimos. Both are believed to be captured asteroids.
|IAU Number||IAU Name||Discovered||Discoverer|
|Mars I||Phobos||1877||A. Hall|
|Mars II||Deimos||1877||A. Hall|
Phobos is the larger of Mars' two moons. It orbits Mars three times a day, and is so close to the planet's surface that in some locations on Mars it cannot always be seen. Phobos is nearing Mars at a rate of six feet (1.8 meters) every hundred years. At that rate, it will either crash into Mars in 50 million years or break up into a ring.
Deimos is the smaller of Mars' two moons. It orbits Mars whirls around Mars every 30 hours.