National Aeronautics and Space Administration Logo
Follow this link to skip to the main content NASA Banner
Solar System Exploration
Planets
Elara: Facts & Figures
   Back to Jupiter   Overview   Facts & Figures   News 
Discovered By
Charles Dillon Perrine
Date of Discovery
1905
Orbit Size Around Jupiter (semi-major axis)
Metric: 11,741,000 km
English: 7,295,519 miles
Scientific Notation: 1.1741x107 km (7.848x10-2 A.U.)
Periapsis (closest)
Metric: 9,188,507 km
Apoapsis (farthest)
Metric: 14,293,493 km
Orbit Circumference
Metric: 72,891,344.30 km
Average Orbit Velocity
Metric: 11,697.5 km/h
Orbit Eccentricity
0.2174
Orbit Inclination
26.627
Mean Radius
Metric: 43.0 (assuming an albedo of 0.04) km
English: 26.7 miles
Equatorial Circumference
Metric: 43.0 km
Volume
Metric: 333,038 km3
Mass
Metric: 869,227,691,196,372,000 kg
Density
Metric: 2.6 g/cm3
Surface Area
Metric: 23,235.22 km2
Surface Gravity
Metric: 0.031 m/s2
Escape Velocity
Metric: 187 km/h
English: 116 mph
Scientific Notation: 52 m/s

Additional Information:

-USGS Astrogeology: Gazetteer of Planetary Nomenclature: http://planetarynames.wr.usgs.gov/append7.html

-JPL Solar System Dynamics: http://ssd.jpl.nasa.gov/

-Solar System Moons: Discovery and Mythology by J├╝rgen Blunck; Springer-Verlag Berlin Heidelberg 2010

-Encyclopedia of the Solar System, second edition; edited by Lucy-Ann McFadden, Paul R. Weissman, and Torrence V. Johnson; Academic Press 2007

-Dr. Ellis Miner
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: 25 Apr 2012