Deimos (moon)

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Orbits of Phobos and Deimos (to scale), as seen from above Mars
Orbits of Phobos and Deimos (to scale), as seen from above Mars

Deimos (or Mars II) is the smaller moon of Mars. Phobos is the other, larger, moon of Mars.

Deimos is only 15 kilometers in diameter. It is covered with craters, as Earth's moon is.

It is named after the god Deimos in Greek mythology.

The other moon, Phobos, is the larger of the two.