Deimos (IPA: /ˈdaɪməs/ or /ˈdiːməs/), is the smaller of the two small moons orbiting Mars, the other being Phobos. It along with Phobos was discovered in 1877 by Asaph Hall. It is named after Deimos, the Greek god of dread. Both Phobos and Deimos are likely to be captured asteroids, and both are small, battered, and irregularly shaped. Deimos orbits Mars at about 14,580 mi (23,460 km) from Mars, almost 3 times as far as Phobos, making it the outer of the two moons.