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Solar System Exploration
Aitne: Facts & Figures
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Discovered By
Scott S. Sheppard, David C. Jewitt and J. Kleyna
Date of Discovery
9 December 2001
Orbit Size Around Jupiter (semi-major axis)
Metric: 23,315,000 km
English: 14,487,269 miles
Periapsis (closest)
Metric: 17,124,868 km
Apoapsis (farthest)
Metric: 29,505,133 km
Sidereal Orbit Period (Length of Year)
1.99890486 Earth years
730.1 Earth days
By Comparison: Retrograde orbit
Orbit Circumference
Metric: 143,875,729.78 km
Average Orbit Velocity
Metric: 8,211.0 km/h
Orbit Eccentricity
Orbit Inclination
By Comparison: Retrograde orbit
Mean Radius
Metric: 1.5 (assuming an albedo of 0.04) km
English: 0.9 miles
Equatorial Circumference
Metric: 9.4 km
Metric: 14 km3
Metric: 44,960,052,992,916 kg
Scientific Notation: 4.4960 x 1013 kg
Metric: 2.6 g/cm3
Surface Area
Metric: 28.27 km2
Surface Gravity
Metric: 0.001 m/s2
Escape Velocity
Metric: 7 km/h

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, retired NASA Jet Propulsion Laboratory Planetary Scientist
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Last Updated: 8 Mar 2011