- Cordelia (moon)
CordeliaCordelia (lower-middle, inside of bright ring), discovery image from Voyager 2Discovery Discovered by Richard J. Terrile / Voyager 2 Discovery date January 20, 1986 Mean orbit radius 49751.722 ± 0.149 km Eccentricity 0.00026 ± 0.000096 Orbital period 0.33503384 ± 0.00000058 d Inclination 0.08479 ± 0.031° (to Uranus' equator) Satellite of UranusPhysical characteristics Dimensions 50 × 36 × 36 km Mean radius 20.1 ± 3 km Surface area ~5500 km²[a] Volume ~38,900 km³[a] Mass ~4.4×1016 kg[a] Mean density ~1.3 g/cm³ (assumed) Equatorial surface gravity ~0.0073 m/s²[a] Escape velocity ~0.017 km/s[a] Rotation period synchronous Axial tilt zero Albedo Temperature ~64 K[a]
Cordelia ( // kor-dee-lee-ə) is the innermost 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 7. It was not detected again until the Hubble Space Telescope observed it in 1997. Cordelia takes its name from the youngest daughter of Lear in William Shakespeare's King Lear. It is also designated Uranus VI.
Other than its orbit, radius of 20 km and geometric albedo of 0.08 virtually nothing is known about it. At the Voyager 2 images Cordelia appears as an elongated object, the major axis pointing towards Uranus. The ratio of axes of the Cordelia's prolate spheroid is 0.7 ± 0.2.
- ^ a b c d e 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 g 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 "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. http://ssd.jpl.nasa.gov/?sat_phys_par. Retrieved 12 December 2008.
- ^ a b Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). http://nssdc.gsfc.nasa.gov/planetary/factsheet/uraniansatfact.html. Retrieved 12 December 2008.
- ^ 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.
- ^ Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular 4168. http://www.cbat.eps.harvard.edu/iauc/04100/04168.html#item1. Retrieved 2011-10-31.
- ^ Showalter, M. R.; Lissauer, J. J. (2003-09-03). "Satellites of Uranus". IAU Circular 8194. http://www.cbat.eps.harvard.edu/iauc/08100/08194.html. Retrieved 2011-10-31.
- ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. http://planetarynames.wr.usgs.gov/append7.html. Retrieved 6 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.
Uranus Discovery Characteristics Major moons Exploration Miscellaneous Moons of Uranus Generally listed in increasing distance from Uranus Inner Major (spheroid) Outer (irregular) Geological features
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