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Solar System Exploration
Harpalyke: Facts & Figures
   Back to Jupiter   Overview   Facts & Figures 
Discovered By
Scott S. Sheppard, David C. Jewitt, Yanga R. Fernandez, and Eugene Magnier
Date of Discovery
23 November 2000
Orbit Size Around Jupiter (semi-major axis)
Metric: 21,104,000 km
English: 13,113,418 miles
Periapsis (closest)
Metric: 16,332,386 km
Apoapsis (farthest)
Metric: 25,875,614 km
Sidereal Orbit Period (Length of Year)
1.706557153 Earth years
623.32 Earth days
By Comparison: Retrograde orbit
Orbit Circumference
Metric: 130,889,070.41 km
Average Orbit Velocity
Metric: 8,749.5 km/h
Orbit Eccentricity
Orbit Inclination
By Comparison: Retrograde orbit
Mean Radius
Metric: 2.2 (assuming an albedo of 0.04) km
English: 1.4 miles
Equatorial Circumference
Metric: 13.8 km
Metric: 45 km3
Metric: 119,893,474,647,775 kg
Scientific Notation: 1.1989 x 1014 kg
Metric: 2.6 g/cm3
Surface Area
Metric: 60.82 km2
Surface Gravity
Metric: 0.002 m/s2
Escape Velocity
Metric: 10 km/h

Additional Information:

-USGS Astrogeology: Gazetteer of Planetary Nomenclature:

-JPL Solar System Dynamics:

-Solar System Moons: Discovery and Mythology by Jürgen 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

-Ellis Miner

-Encyclopædia Britannica Online. 2010:
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Last Updated: 8 Mar 2011