Moons of Mars facts for kids

Phobos (top) and Deimos (bottom).

Mars has two little moons, Phobos and Deimos, which are thought to be captured asteroids. They were found by Asaph Hall in 1877.

Moons

Name and how to say its name			Image	diameter (km)	Mass (kg)
Mars I	Phobos	/ˈfoʊbəs/ FOE-bəs		22.2 km (27×21.6×18.8)	1.08×10¹⁶
Mars II	Deimos	/ˈdaɪməs/ DYE-məs		12.6 km (10×12×16)	2×10¹⁵

Curiosity's view of the Martian moons: Phobos passing in front of Deimos – in real-time (video-gif, 1 August 2013)
The telescope used to discover the Martian moons
Night sky of Mars showing Deimos (left) and Phobos (right) in front of Sagittarius, as viewed by the Mars Spirit rover (26 August 2005).
Apparent sizes of the moons of Mars, Deimos and Phobos, and the Moon as viewed from the surface of their respective planets (Mars' moons imaged by the Curiosity rover, 1 August 2013)
Animation illustrating the asteroid-belt origin for the moons
Orbits of moons and spacecraft orbiting Mars.
Phobos, with Stickney Crater on the right (2003).
Phobos (1998).

The Solar System

Sun • Heliosphere	Planets ☾ = moon(s) ∅ = rings		Mercury	Venus	Earth ☾	Mars ☾

			Jupiter ☾ ∅	Saturn ☾ ∅	Uranus ☾ ∅	Neptune ☾ ∅

	Dwarf planets		Ceres	Pluto ☾	Haumea ☾	Makemake

			Eris ☾

	Small Solar System bodies	Asteroids (minor planets)	Groups and families: Vulcanoids · Near-Earth asteroids · Asteroid belt Jupiter Trojans · Centaurs · Neptune Trojans · Asteroid moons · Meteoroids · Pallas · Juno · Vesta · Hygiea · Interamnia · Europa
		Asteroids (minor planets)	See also the list of asteroids.

		Trans- Neptunians	Kuiper belt – Plutinos: Orcus · Ixion – Cubewanos: Varuna · Quaoar · Huya
		Trans- Neptunians	Scattered disc: Sedna

		Comets	Periodic comets and non-periodic comets Damocloids · Oort cloud
See also the list of solar system objects