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Ophelia (moon)

Moon of Uranus

Field	Value
name	Ophelia
image	Cordelia Ophelia Voyager 2 labeled.png
caption	Ophelia (top), Cordelia (bottom), and Uranus's narrow rings photographed from afar by Voyager 2 on 21 January 1986. The moons appear smeared due to their orbital motion during the image exposure.
mpc_name	Uranus VII
pronounced
adjective	Ophelian
discovery_ref
discoverer	Richard J. Terrile / Voyager 2
discovered	January 20, 1986
orbit_ref
semimajor
eccentricity
period
avg_speed	10.39 km/s
inclination	(to Uranus's equator)
satellite_of	Uranus
group	ring shepherd
dimensions	54 × 38 × 38 km
surface_area	~5900 km2
volume
mass
density
surface_grav	~– m/s2
escape_velocity	~– km/s
rotation	synchronous
axial_tilt	zero
magnitude	23.26 (at opposition)
albedo
0.07
single_temperature	~65 K

0.07

Ophelia 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. It was not seen again until the Hubble Space Telescope recovered it in 2003. Ophelia was named after the daughter of Polonius, Ophelia, in William Shakespeare's play Hamlet. It is also designated Uranus VII.

Other than its orbit, size of 54 × 38 km, and geometric albedo of 0.065, little is known about it. In images taken by Voyager 2, Ophelia appears as an elongated object, with its major axis pointing towards Uranus. The ratio of axes of the Ophelia's prolate spheroid is 0.7 ± 0.3.

Ophelia acts as the outer shepherd satellite for Uranus's ε ring. The orbit of Ophelia is within the synchronous orbit radius of Uranus, and is therefore slowly decaying due to tidal forces.

Notes

| Calculated on the basis of other parameters.

References

| access-date = 12 December 2008

| access-date = 2011-10-31

| access-date = 6 August 2006 | archive-url = https://web.archive.org/web/20160305150456/http://planetarynames.wr.usgs.gov/Page/Planets | archive-date = 5 March 2016

References

Benjamin Smith. (1903). "The Century Dictionary and Cyclopedia".
{{OED. Ophelian

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