Deimos, one of the two moons of Mars, is a teeny little guy with an average radius of just 6.2 km.

Deimos, one of the two moons of Mars, is a teeny little guy with an average radius of just 6.2 km.

From Wikiwand: Orbits of Phobos and Deimos (to scale)

From Wikiwand: Orbits of Phobos and Deimos (to scale)

Curiosity's view of Mars's moon Phobos passing in front of Deimos.

Curiosity's view of Mars's moon Phobos passing in front of Deimos.

#OnThisDay in 1877 American astronomer Asaph Hall discovers the Mars moon Deimos. http://en.wikipedia.org/wiki/Deimos_(moon)

#OnThisDay in 1877 American astronomer Asaph Hall discovers the Mars moon Deimos. http://en.wikipedia.org/wiki/Deimos_(moon)

Phobos and Deimos - the Moons of Mars.

Phobos and Deimos - the Moons of Mars.

Illustration comparing apparent sizes of moons between Mars's Deimos, Phobos and Earth's Moon

Illustration comparing apparent sizes of moons between Mars's Deimos, Phobos and Earth's Moon

Fotos: Condenado Lua de Marte. Sua órbita é tão perto de Marte que forças…

Fotos: Condenado Lua de Marte. Sua órbita é tão perto de Marte que forças…

The two small moons of Mars: Phobos and Deimos Image Credit: NASA/JPL-Caltech/University of Arizona

The two small moons of Mars: Phobos and Deimos Image Credit: NASA/JPL-Caltech/University of Arizona

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