Umbriel (moon of Uranus)

Document v1 · published by Koskamo · updated 2026-10-05

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

Planet: Uranus
Satellite: Umbriel
Satellite code: 702
GM: 85.1 ± 1.9 km³/s² (ephemeris URA111)
Mean Radius: 584.7 ± 2.8 km (reference 1)
Mean Density: 1.523 ± 0.041 g/cm³ (NASA note: Mean Density is derived from the specified GM and Mean Radius.)
Ephemeris: URA182
Reference frame: equatorial
Epoch (TDB): 2000-01-01.5
Semi-major axis a: 265986. km
Eccentricity e: 0.004
Argument of periapsis ω: 183.4 deg
Mean anomaly M: 253.0 deg
Inclination i: 0.1 deg
Longitude of ascending node: 174.8 deg
Sidereal period P: 4.144177 days
Argument of periapsis precession period: 64.126 yr
Longitude of ascending node precession period: 129.745 yr
Mean elements reference: 45

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 Koskamo2026-10-05
Version 1