Moon of Uranus
Cordelia is theinnermost known moon ofUranus . It was discovered from the images taken byVoyager 2 on January 20, 1986, and was given the temporary designationS/1986 U 7 .[ 1] It was not detected again until theHubble Space Telescope observed it in 1997.[ 7] [ 9] Cordelia takes its name from the youngest daughter of Lear inWilliam Shakespeare 'sKing Lear . It is also designatedUranus VI .[ 10]
Other than its orbit,[ 4] size of 50 km × 36 km (31 mi × 22 mi),[ 5] andgeometric albedo of 0.06,[ 7] little is known about it. In theVoyager 2 images, Cordelia appears as an elongated object with its major axis pointing towards Uranus. The ratio of axes of Cordelia's prolate spheroid is 0.7± 0.2 .[ 5]
Cordelia acts as the innershepherd satellite for Uranus'sε ring .[ 11] Cordelia's orbit is within Uranus's synchronous orbit radius, and is therefore slowly decaying due totidal deceleration .[ 5]
Cordelia is very close to a 5:3orbital resonance withRosalind .[ 12]
^a b c d Calculated on the basis of other parameters. ^a b Smith, B. A. (1986-01-27)."Satellites and Rings of Uranus" .IAU Circular .4168 . Retrieved2011-10-31 . ^ Benjamin Smith (1903).The Century Dictionary and Cyclopedia . ^ Jennifer Bates (2010).Hegel and Shakespeare on Moral Imagination . p. 102. ^a b Jacobson, R. A. (1998)."The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager 2 Observations" .The Astronomical Journal .115 (3):1195– 1199.Bibcode :1998AJ....115.1195J .doi :10.1086/300263 . ^a b c d e f Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites".Icarus .151 (1):69– 77.Bibcode :2001Icar..151...69K .doi :10.1006/icar.2001.6597 .^a b c French, Richard G.; Hedman, Matthew M.; Nicholson, Philip D.; Longaretti, Pierre-Yves; McGhee-French, Colleen A. (2024-03-15)."The Uranus system from occultation observations (1977–2006): Rings, pole direction, gravity field, and masses of Cressida, Cordelia, and Ophelia" .Icarus .411 115957.arXiv :2401.04634 .doi :10.1016/j.icarus.2024.115957 .ISSN 0019-1035 . ^a b c Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope".Icarus .151 (1):51– 68.Bibcode :2001Icar..151...51K .doi :10.1006/icar.2001.6596 .^ Williams, Dr. David R. (23 November 2007)."Uranian Satellite Fact Sheet" .NASA (National Space Science Data Center). Retrieved12 December 2008 . ^ Showalter, M. R.; Lissauer, J. J. (2003-09-03)."Satellites of Uranus" .IAU Circular .8194 . Retrieved2011-10-31 . ^ "Planet and Satellite Names and Discoverers" .Gazetteer of Planetary Nomenclature . USGS Astrogeology. July 21, 2006. Retrieved6 August 2006 .^ Esposito, L. W. (2002). "Planetary rings".Reports on Progress in Physics .65 (12):1741– 1783.Bibcode :2002RPPh...65.1741E .doi :10.1088/0034-4885/65/12/201 .S2CID 250909885 .^ Murray, Carl D.; Thompson, Robert P. (1990-12-06). "Orbits of shepherd satellites deduced from the structure of the rings of Uranus".Nature .348 (6301):499– 502.Bibcode :1990Natur.348..499M .doi :10.1038/348499a0 .ISSN 0028-0836 .S2CID 4320268 .
Listed in approximately increasing distance fromUranus Inner Major (spheroid) Outer (irregular)
Caliban group (3) Margaret (1) Other retrograde moons (6)
Geological features