Deimos Moon Facts
- Moon Name: Deimos
- Other Names:: Mars II
- Formed: Over 4 billion years ago
- Discovered: August 12th, 1877 by Asaph Hall III
- Distance from Mars: Between 14,574 miles (perigee) and 14,584 miles (apogee)
- Time to Orbit Around Mars: About 1.26 Earth days
- Total Surface Area: 307 square miles
16 Deimos Facts for Kids
- Deimos is one of the two natural satellites (moons) of the planet Mars.
- The name Deimos comes from Greek mythology. Deimos was the god of dread, the twin brother of Phobos and the son of Ares and Aphrodite.
- Deimos was discovered by Asaph Hall, III on August 12th, 1877.
- Deimos has no atmosphere due to its small size and lack of gravity.
- Deimos is around 8 miles across, making it one of the smallest moons in our Solar System.
- Deimos has a surface area of about 307 square miles.
- The mean radius of Deimos is 3.9 miles.
- Deimos is the smallest of the two moons that orbit Mars.
- The closest (perigee) Deimos’s orbit gets to Mars is 14,574 miles.
- The farthest (apogee) Deimos’s orbit gets from Mars is 14,584 miles.
- Deimos has the farthest orbit of the two moons that orbit Mars.
- Deimos takes around 30 Earth hours to orbit the planet Mars.
- Deimos’s orbit is getting longer as time passes, and it’s due to its distance from Mars.
- Deimos will eventually escape the orbit of Mars and become an asteroid.
- The largest crater on the surface of Deimos is Voltaire and it has a diameter of almost 1.2 miles.
- The first photograph of Deimos was taken in 1971, by the Mariner 9 spacecraft.
Pictures of the Moon Deimos
A photo showing the shadow of Deimos over the planet Mars.
A photo of Deimos moon (left) compared to Phobos moon (right).
A close-up photo of the surface of the Mar’s moon Deimos.
Additional Resources on the Moon Deimos
- Deimos – NASA Solar System Exploration – Explore the moon Deimos on the NASA Solar System Exploration website.
- Phobos and Deimos – Learn about the Phobos and Deimos moons on the ESA website.
- Deimos on Britannica – Find more facts about Deimos on the Britannica website.