+
NASA Homepage
+
NASA en Español
+
Contact NASA
SSE Home
>
Planets
>
Mars
>
Moons
>
Deimos
> Facts & Figures
Our Solar System
Sun
Mercury
Venus
Earth
Earth's Moon
Mars
Asteroids
Meteoroids
Jupiter
Saturn
Uranus
Neptune
Pluto
Comets
Kuiper Belt
Dwarf Planets
Oort Cloud
Beyond Our Solar System
Mars: Moons: Deimos: Facts & Figures
Discovered By
A. Hall
Date of Discovery
1877
Average Distance from Mars
Metric:
23,459 km
Equatorial Radius
Metric:
7.5 x 6.1 x 5.2 km
Mass
Metric:
2,380,000,000,000,000 kg
Scientific Notation:
2.38 x 10
15
kg
Rotation Period (Length of Day)
1.026 Earth days
24.62 hours
By Comparison:
Synchronous with Mars
Sidereal Orbit Period (Length of Year)
1.2624407 Earth days
Orbital Eccentricity
0.0005
Orbital Inclination to Ecliptic
0.9 - 2.7 degrees
1. Phobos
2. Deimos
Explore more of NASA on the Web:
NASA Site Network
Ciencia@NASA
Earth Observatory
Great Images in NASA
Human Space Flight Web
Liftoff to Learning
Mars Exploration
NASA Education Program
NASA History
NASA Image Exchange
NASA Kids
NASA Science Update Newsletter
Planetary Photojournal
Science@NASA
NASA Technology
NASA Enterprises and Field Centers
Aeronautics Research
Earth Science
Exploration Systems
Office of Space Operations
Space Science
NASA Headquarters
Ames Research Center
Dryden Flight Research Center
Glenn Flight Research Center
Goddard Space Flight Center
Jet Propulsion Laboratory
Johnson Space Center
Kennedy Space Center
Langley Research Center
Marshall Space Flight Center
Stennis Space Center
+
Awards & Recognition
+
Send to a Friend
+
The Vision for Space Exploration
+
NASA Solar System Exploration Roadmap
+
Privacy/Copyright/Image Use Policy
Site Curators: Kirk Munsell, Harman Smith, Phil Davis
Science Writer: Samantha Harvey
Webmaster: David Martin
NASA Official: Marilyn Lindstrom
Last Updated: 09.30.03
+
Contact Us