Cordelia (moon)
{{Short description|Moon of Uranus}}
{{Infobox planet
| name = Cordelia
| image = Cordelia 01-24-86.png
| caption = Cordelia (Imaged 24 January 1986)
| discoverer = Richard J. Terrile / Voyager 2
| discovered = January 20, 1986
| mpc_name = Uranus VI
| pronounced = {{IPAc-en|k|ɔr|ˈ|d|iː|l|i|ə}}{{cite book|author=Benjamin Smith|year=1903|title=The Century Dictionary and Cyclopedia}}
| adjective = Cordelian{{cite book|author=Jennifer Bates|year=2010|title=Hegel and Shakespeare on Moral Imagination|page=102}}
| semimajor = {{val|49751.722|0.149|u=km}}
| eccentricity = {{val|0.00026|0.000096}}
| period = {{val|0.33503384|0.00000058|u=d}}
| inclination = {{val|0.08479|0.031|u=°}} (to Uranus's equator)
| satellite_of = Uranus
| group = ring shepherd
| dimensions = 50 × 36 × 36 km{{refn|group=note|Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.}}
| surface_area = ~{{val|5200|u=km2}}{{efn|name=calculated}}
| volume = {{val|33900|34.9|u=km3|errend=%}}
| mass = {{val|6.08|0.57|u=kg|e=16}}
| density = {{val|1.79|0.97|0.49|u=g/cm3}}
| surface_grav = ~{{Gr|6.08e-5|25}}–{{Gr|6.08e-5|18}} m/s2{{efn|name=calculated}}
| escape_velocity = ~{{V2|6.08e-5|25}}–{{V2|6.08e-5|18}} km/s{{efn|name=calculated}}
| albedo = {{val|0.06|0.01}}
0.07
| single_temperature = ~65 K{{efn|name=calculated}}
}}
Cordelia is the innermost known 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, size of 50 × 36 km, and geometric albedo of 0.06, little is known about it. In the Voyager 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 {{val|0.7|0.2}}.
Cordelia acts as the inner shepherd satellite for Uranus's ε ring. Cordelia's orbit is within Uranus's synchronous orbit radius, and is therefore slowly decaying due to tidal deceleration.
Cordelia is very close to a 5:3 orbital resonance with Rosalind.
See also
Notes
{{notes
| notes =
{{efn
| name = calculated
| Calculated on the basis of other parameters.
}}
}}
References
{{reflist
| refs =
{{cite journal| doi = 10.1086/300263| last1 = Jacobson| first1 = R. A.| year = 1998| title = The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager 2 Observations| journal = The Astronomical Journal| volume = 115| issue = 3| pages = 1195–1199| bibcode = 1998AJ....115.1195J| doi-access = free}}
{{cite journal| doi = 10.1006/icar.2001.6597| last = Karkoschka| first = Erich| author-link = Erich Karkoschka| year = 2001| title = Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites| journal = Icarus| volume = 151| issue = 1| pages = 69–77| bibcode = 2001Icar..151...69K| ref = {{sfnRef|Karkoschka, Voyager|2001}}}}
{{cite web
| last = Williams
| first = Dr. David R.
| date = 23 November 2007
| title = Uranian Satellite Fact Sheet
| publisher = NASA (National Space Science Data Center)
| url = http://nssdc.gsfc.nasa.gov/planetary/factsheet/uraniansatfact.html
| access-date = 12 December 2008
}}
{{cite journal| doi = 10.1006/icar.2001.6596| last = Karkoschka| first = Erich| author-link = Erich Karkoschka| year = 2001| title = Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope| journal = Icarus| volume = 151| issue = 1| pages = 51–68| bibcode = 2001Icar..151...51K| ref = {{sfnRef|Karkoschka, Hubble|2001}}}}
{{cite journal
| last = Smith
| first = B. A.
| title = Satellites and Rings of Uranus
| journal = IAU Circular
| volume = 4168
| date = 1986-01-27
| url = http://www.cbat.eps.harvard.edu/iauc/04100/04168.html#item1
| access-date = 2011-10-31
}}
{{cite journal
| last1 = Showalter
| first1 = M. R.
| last2 = Lissauer
| first2 = J. J.
| title = Satellites of Uranus
| journal = IAU Circular
| volume = 8194
| date = 2003-09-03
| url = http://www.cbat.eps.harvard.edu/iauc/08100/08194.html
| access-date = 2011-10-31
}}
{{cite web
| title = Planet and Satellite Names and Discoverers
| work = Gazetteer of Planetary Nomenclature
| publisher = USGS Astrogeology
| date = July 21, 2006
| url = http://planetarynames.wr.usgs.gov/Page/Planets
| access-date = 6 August 2006
}}
{{cite journal| doi = 10.1088/0034-4885/65/12/201| last = Esposito| first = L. W.| author-link = Larry W. Esposito| year = 2002| title = Planetary rings| journal = Reports on Progress in Physics| volume = 65| issue = 12| pages = 1741–1783| bibcode = 2002RPPh...65.1741E| s2cid = 250909885}}
{{cite journal| doi = 10.1038/348499a0| last1 = Murray| first1 = Carl D.| last2 = Thompson| first2 = Robert P.| date = 1990-12-06| title = Orbits of shepherd satellites deduced from the structure of the rings of Uranus| journal = Nature| issn = 0028-0836| volume = 348| issue = 6301| pages = 499–502| bibcode = 1990Natur.348..499M| s2cid = 4320268}}
{{Cite journal |last=French |first=Richard G. |last2=Hedman |first2=Matthew M. |last3=Nicholson |first3=Philip D. |last4=Longaretti |first4=Pierre-Yves |last5=McGhee-French |first5=Colleen A. |date=2024-03-15 |title=The Uranus system from occultation observations (1977–2006): Rings, pole direction, gravity field, and masses of Cressida, Cordelia, and Ophelia |url=https://www.sciencedirect.com/science/article/pii/S0019103524000150 |journal=Icarus |volume=411 |pages=115957 |doi=10.1016/j.icarus.2024.115957 |issn=0019-1035|arxiv=2401.04634 }}
}}
External links
- [https://web.archive.org/web/20070609143229/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Ura_Cordelia Cordelia Profile] by [http://solarsystem.nasa.gov NASA's Solar System Exploration]
- [http://www.dtm.ciw.edu/users/sheppard/satellites/urasatdata.html Uranus' Known Satellites] (by Scott S. Sheppard)
{{Uranus}}
{{Moons of Uranus}}
{{Solar System moons (compact)}}
{{DEFAULTSORT:Cordelia (Moon)}}