Ophelia
A regular moon of Uranus about 43 km across, one orbit every 0.38 days.
Where it is right now
Ophelia is in Taurus, 19.9 AU away.
Computed for 2 August 2026, 17:00 UTC, and recomputed at least hourly. This page is cached, so treat the line above as accurate to the hour rather than to the second. The map shows the live position.
Position from a Kepler propagation of the published elements below, accurate to about an arcminute.
Facts
Every line carries the source it came from.
- Mean radius
- 21.4 kmSource: IAU/NASA planetary satellite fact sheets
- Orbits
- Uranus, 53,765 km out on averageSource: NASA/JPL Planetary Satellite Mean Elements
- Orbital period
- 0.38 daysSource: NASA/JPL Planetary Satellite Mean Elements
- Orbit shape
- eccentricity 0.0110, inclined 0.20 degrees to Uranus's Laplace planeSource: NASA/JPL Planetary Satellite Mean Elements
- Discovered
- 1986 by Voyager Science TeamSource: NASA/JPL Planetary Satellite Discovery Circumstances
Physical size
- Mean radius
- 21.4 km
- Diameter
- 43 km across
Orbit
Elements are relative to Uranus.
- Average distance from Uranus
- 53,765 km
- Closest and furthest
- 53,174 km to 54,356 km
- Eccentricity
- 0.0110, almost circular
- Inclination to Uranus's reference plane
- 97.53 degrees
- Orbital period
- 9.0 hours
- Longitude of ascending node
- 167.75 degrees
- Argument of periapsis
- 165.85 degrees
- Mean anomaly at J2000.0
- 178.97 degrees
Family
Orbits Uranus.
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Catalog id ophelia. 3,172 objects on the map, of which 171 are hand-authored with sourced facts.