Deimos ("DEE mos") is the smaller and outermost of Mars' two moons.
It is one of the smallest known moons in the solar system.
orbit: 23,459 km from Mars
diameter: 12.6 km (15 x 12.2 x 11)
mass: 1.8e15 kg
In Greek mythology, Deimos is one of the sons of Ares (Mars)
and Aphrodite (Venus); "deimos" is Greek for "panic".
Discovered 1877 August 12 by Hall, photographed by
Viking 1 in 1977.
Deimos and Phobos are composed of carbon-rich
rock like C-type asteroids and ice.
Both are heavily cratered.
Deimos and Phobos are probably
Jupiter into orbits that allowed them to be captured by Mars.
More about Deimos
- There is no completely satisfactory theory as to how Deimos and Phobos came
to be in orbit around Mars.
Bill Arnett; last updated:
2004 Nov 19