Ophelia (moon)

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Ophelia (pronounced /ɵˈfiːliə/ o-FEE-lee-ə) is a moon of Uranus. It was discovered from the images taken by Voyager 2 on January 20, 1986, and was given the temporary designation S/1986 U 8.[7] It was not seen until the Hubble Space Telescope recovered it in 2003.[6][8] Ophelia was named after the daughter of Polonius, Ophelia, in William Shakespeare's play Hamlet. It is also designated Uranus VII.[9]

Other than its orbit,[1] radius of 21 km[2] and geometric albedo of 0.08[6] virtually nothing is known about it. At the Voyager 2 images Ophelia appears as an elongated object, the major axis pointing towards Uranus. The ratio of axes of the Ophelia's prolate spheroid is 0.7 ± 0.3.[2]

Ophelia acts as the outer shepherd satellite for Uranus' Epsilon ring.[10] The orbit of Ophelia is within the synchronous orbit radius of Uranus, and therefore the moon is slowly decaying due to tidal forces.[2]

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