Editing Cordelia (moon)

{{Short description|Moon of Uranus}}
{{Distinguish|text=the tanker ship [[2024_in_piracy#Cordelia_Moon|Cordelia Moon]]}}
{{Infobox planet
| name             = Cordelia
| image            = Cordelia 01-24-86.png
| caption          = Cordelia (Imaged 24 January 1986)
| discovery_ref    = <ref name="IAUC 4168"/>
| 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}}<ref>{{cite book|author=Benjamin Smith|year=1903|title=The Century Dictionary and Cyclopedia}}</ref>
| adjective        = Cordelian<ref>{{cite book|author=Jennifer Bates|year=2010|title=Hegel and Shakespeare on Moral Imagination|page=102}}</ref>
| orbit_ref        = <ref name="Jacobson 1998"/>
| 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<ref name="Karkoschka, Voyager 2001"/>{{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=%}}<ref name = "FrenchEtAl2024"/>
| mass             = {{val|6.08|0.57|u=kg|e=16}}<ref name = "FrenchEtAl2024"/>
| density          = {{val|1.79|0.97|0.49|u=g/cm3}}<ref name = "FrenchEtAl2024"/>
| surface_grav     = ~{{Gr|6.08e-5|25}}–{{Gr|6.08e-5|18}} [[Acceleration|m/s<sup>2</sup>]]{{efn|name=calculated}}
| escape_velocity  = ~{{V2|6.08e-5|25}}–{{V2|6.08e-5|18}} km/s{{efn|name=calculated}}
| rotation         = synchronous<ref name="Karkoschka, Voyager 2001"/>
| axial_tilt       = zero<ref name="Karkoschka, Voyager 2001"/>
| albedo           = {{val|0.06|0.01}}<ref name="Karkoschka, Hubble 2001"/><br>0.07<ref name="Williams 2007 nssdc"/>
| single_temperature = ~65 [[Kelvin|K]]{{efn|name=calculated}}
}}

'''Cordelia''' is the [[inner satellite|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&nbsp;U&nbsp;7'''.<ref name="IAUC 4168"/> It was not detected again until the [[Hubble Space Telescope]] observed it in 1997.<ref name="Karkoschka, Hubble 2001"/><ref name="IAUC 8194"/> Cordelia takes its name from the youngest daughter of Lear in [[William Shakespeare]]'s ''[[King Lear]].'' It is also designated '''Uranus&nbsp;VI'''.<ref name="Gazetteer"/>

Other than its orbit,<ref name="Jacobson 1998"/> size of 50 × 36 km,<ref name="Karkoschka, Voyager 2001" /> and [[geometric albedo]] of 0.06,<ref name="Karkoschka, Hubble 2001"/> virtually nothing 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}}.<ref name="Karkoschka, Voyager 2001"/>

Cordelia acts as the inner [[shepherd satellite]] for Uranus's [[Rings_of_Uranus#ε_(epsilon)_ring|ε ring]].<ref name="Esposito 2002"/> Cordelia's orbit is within Uranus's synchronous orbit radius, and is therefore slowly decaying due to [[tidal deceleration]].<ref name="Karkoschka, Voyager 2001"/>

Cordelia is very close to a 5:3 [[orbital resonance]] with [[Rosalind (moon)|Rosalind]].<ref name="Murray Thompson 1990"/>

== See also ==

* [[Moons of Uranus]]

== Notes ==

{{notes
| notes =

{{efn
| name = calculated
| Calculated on the basis of other parameters.
}}

}}

== References ==
{{reflist
| refs =

<ref name="Jacobson 1998">
{{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}}
</ref>

<ref name="Karkoschka, Voyager 2001">
{{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}}}}
</ref>

<ref name="Williams 2007 nssdc">
{{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
}}
</ref>

<ref name="Karkoschka, Hubble 2001">
{{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}}}}
</ref>

<ref name="IAUC 4168">
{{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
}}
</ref>

<ref name="IAUC 8194">
{{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
}}
</ref>

<ref name="Gazetteer">
{{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
}}
</ref>

<ref name="Esposito 2002">
{{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}}
</ref>

<ref name="Murray Thompson 1990">
{{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}}
</ref>

<ref name = "FrenchEtAl2024">
{{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 }}
</ref>

}}

== 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)}}
[[Category:Moons of Uranus]]
[[Category:Astronomical objects discovered in 1986|19860120]]
[[Category:Moons with a prograde orbit]]
[[Category:King Lear]]