National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Planets
Ganymede: Facts & Figures
   Back to Jupiter   Overview   Gallery   Facts & Figures   News 
Discovered By
Galileo Galilei
Date of Discovery
1610
Orbit Size Around Jupiter (semi-major axis)
Metric: 1,070,400 km
Periapsis (closest)
Metric: 1,069,008 km
Apoapsis (farthest)
Metric: 1,071,792 km
Orbit Circumference
Metric: 6,725,518.71 km
Average Orbit Velocity
Metric: 39,165.6 km/h
Orbit Eccentricity
0.0013
Orbit Inclination
0.177 degree
Mean Radius
Metric: 2,631.2 km
Equatorial Circumference
Metric: 16,532.3 km
Volume
Metric: 76,304,506,998 km3
Mass
Metric: 148,185,846,875,052,000,000,000 kg
Scientific Notation: 1.4819 x 1023 kg
Density
Metric: 1.942 g/cm3
Surface Area
Metric: 86,999,665.93 km2
Surface Gravity
Metric: 1.428 m/s2
Escape Velocity
Metric: 9,869 km/h
English: 6,133 mph
Scientific Notation: 2742 m/s
Sidereal Rotation Period (Length of Day)
7.155 Earth days
By Comparison: Synchronous with orbital period
Atmospheric Constituents
Oxygen
Awards and Recognition   Solar System Exploration Roadmap   Contact Us   Site Map   Print This Page
NASA Official: Kristen Erickson
Advisory: Dr. James Green, Director of Planetary Science
Outreach Manager: Alice Wessen
Curator/Editor: Phil Davis
Science Writer: Autumn Burdick
Producer: Greg Baerg
Webmaster: David Martin
> NASA Science Mission Directorate
> Budgets, Strategic Plans and Accountability Reports
> Equal Employment Opportunity Data
   Posted Pursuant to the No Fear Act
> Information-Dissemination Policies and Inventories
> Freedom of Information Act
> Privacy Policy & Important Notices
> Inspector General Hotline
> Office of the Inspector General
> NASA Communications Policy
> USA.gov
> ExpectMore.gov
> NASA Advisory Council
> Open Government at NASA
Last Updated: 12 Aug 2013