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Solar System Exploration
Elara: Facts & Figures
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Discovered By
Charles Dillon Perrine
Date of Discovery
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
Sidereal Orbit Period (Length of Year)
0.710855578 Earth years
259.64 Earth days
Orbit Circumference
Metric: 72,891,344.30 km
Average Orbit Velocity
Metric: 11,697.5 km/h
Orbit Eccentricity
Orbit Inclination
Mean Radius
Metric: 43.0 (assuming an albedo of 0.04) km
English: 26.7 miles
Equatorial Circumference
Metric: 43.0 km
Metric: 333,038 km3
Metric: 869,227,691,196,372,000 kg
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:

-JPL Solar System Dynamics:

-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
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Last Updated: 25 Apr 2012