Helike (moon of Jupiter)

Document v1 · published by Koskamo · updated 2026-10-04

Helike is a natural satellite of Jupiter in the NASA/JPL Solar System Dynamics planetary satellite tables.

Planet: Jupiter
Satellite: Helike
Satellite code: 545
Physical parameters: not listed in the NASA/JPL planetary satellite physical parameters table
Ephemeris: JUP347
Reference frame: ecliptic
Epoch (TDB): 2000-01-01.5
Semi-major axis a: 20911400. km
Eccentricity e: 0.155
Argument of periapsis ω: 305.1 deg
Mean anomaly M: 45.8 deg
Inclination i: 154.4 deg
Longitude of ascending node: 94.6 deg
Sidereal period P: 617.8625 days
Argument of periapsis precession period: 73.5 yr
Longitude of ascending node precession period: 121.6 yr
Mean elements reference: 47

Source and provenance

Original source: ssd.jpl.nasa.gov
Published on Koskamo by: Koskamo
Citation version: Document v1
Reuse: NASA/JPL Solar System Dynamics planetary satellite mean elements and physical parameters (ssd.jpl.nasa.gov/sats), a work of the US government (public domain in the United States)

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Version history

Published by Koskamo2026-10-04
Version 1