Map of the Universe
Deimos
Moon · Smaller and outer moon of Mars
About Deimos
On 2026-01-01, the date the map shows, Deimos was 1.43 AU from the Sun; sunlight takes 11.9 minutes to reach it.
It goes round its planet once every 1.26 days, 23,459 km away on average.
It is about 12.4 km across.
The map lists it as a moon and shows it in the Solar System part of the map, drawn on the plane of Earth’s orbit (the ecliptic).
Key numbers
| Orbit radius (semi-major axis) | 23,459 km |
|---|---|
| Orbital period | 1.26 days |
| Eccentricity | 0.0003 |
| Inclination | 24.17° |
| Radius | 6.2 km |
| Distance from the Sun | 1.43 AU |
Where it is
Its place in the universe, from the inside out: Mars › Solar System › Orion–Cygnus Arm (Local Arm) › Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.
Zoom out to see it in context: Inner planets, a view about 4 AU across.
From Wikipedia
Deimos is the smaller and outer of the two natural satellites of Mars, the other being Phobos. Deimos has a mean radius of 6.2 km (3.9 mi) and takes 30.3 hours to orbit Mars. Deimos is 23,457.50 km (14,575.81 mi) from Mars, much farther than Mars's other moon, Phobos.
Excerpt from the Wikipedia article Deimos (moon), licensed CC BY-SA 4.0.