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Ophelia (moon)

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Discovered by Richard J. Terrile / Voyager 2
Discovery time January 20, 1986
Avgdistance from the center of its orbital path 53,763.390 ± 0.847 km
How egg-shaped its orbit is
0.00992 ± 0.000107
How long it takes to complete an orbit 0.37640039 ± 0.00000357 d
Angle above the reference plane
0.10362 ± 0.055° (to Uranus' equator)
What it orbits Uranus
Size and Other Qualities
Measures 54 × 38 × 38 km
Average distance from its center to its surface 23 ± 4 km
Area of its surface ~6600 km²
Volume inside it ~41,000 km³
Mass ~5.1×1016 kg
Average density ~1.3 g/cm³ assumed
Gravity at its surface ~0.0070 m/s2
Slowest speed able to escape into space
("escape velocity")
~0.018 km/s
How long it takes to turn around one time synchronous
Angle at which it turns
(in relation to its orbit)
How much light it reflects 0.08 ± 0.01
Avg. surface temp. ~64 K
Discovery image of Ophelia

Ophelia is a closer moon of Uranus. It was found from the images taken by Voyager 2 on January 20, 1986, and was given the designation S/1986 U 8. It was not seen until the Hubble Space Telescope saw it in 2003.

Ophelia was named after the daughter of Polonius, Ophelia, in William Shakespeare's play Hamlet. It is also designated Uranus VII.

Unfortunately, other than its orbit, radius of 23 km and geometric albedo of 0.08, almost nothing is known about it. At the Voyager 2 images Ophelia appears as a streched object, the major axis pointing towards Uranus.

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