Mars II

   Deimos ("DEE mos") is the smaller and outermost of Mars' two moons. It is the smallest known moon 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 10 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 asteroids perturbed by Jupiter into orbits that allowed them to be captured by Mars.

More about Deimos

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Contents ... Mars ... Phobos ... Deimos ... Jupiter ... Data Host

Bill Arnett; last updated: 1995 Dec 28