Puck (moon)
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2008-06-17T12:07:36Z
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{{Infobox Planet
| name = Puck
| image = [[Image:puck.png|200px]]
| bgcolour = #ffc0c0
| discovery = yes
| discoverer = [[Stephen P. Synnott]] / ''[[Voyager 2]]''
| discovered = [[December 30]], [[1985]]
| mean_orbit_radius = 86,004.444 ± 0.064 [[kilometre|km]]<ref name=Jacobson1998>{{cite journal|last=Jacobson|first=R.A.|title=The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations|journal=The Astronomical Journal|url=http://adsabs.harvard.edu/abs/1998AJ....115.1195J|year=1998|volume=115|pages=1195–1199|doi=10.1086/300263}}</ref>
| eccentricity = 0.00012 ± 0.000061<ref name=Jacobson1998/>
| period = 0.76183287 ± 0.000000014 d<ref name=Jacobson1998/>
| inclination = 0.31921 ± 0.021° (to Uranus' equator)<ref name=Jacobson1998/>
| satellite_of = [[Uranus (planet)|Uranus]]
| physical_characteristics = yes
| mean_radius = 81 ± 2 km<ref name="Karkoschka2001b">{{cite journal|last=Karkoschka|first=Erich|authorlink=Erich Karkoschka|title=Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites|journal=Icarus|volume=151|pages=69–77|year=2001| doi=10.1006/icar.2001.6597|url=http://adsabs.harvard.edu/abs/2001Icar..151...69K}}</ref>
| surface_area = ~82,400 [[square kilometre|km²]]<ref name=stub1>Calculated on the basis of other parameters</ref>
| volume = ~2,225,000 [[cubic kilometre|km³]]<ref name=stub1/>
| mass = ~2.9{{e|18}} [[kilogram|kg]]<ref name=stub1/>
| density = ~1.3 g/cm³ (assumed)
| surface_grav = 0.028 [[Acceleration|m/s<sup>2</sup>]]<ref name=stub1/>
| escape_velocity = 0.069 km/s <ref name=stub1/>
| rotation = synchronous<ref name="Karkoschka2001b"/>
| axial_tilt = zero<ref name="Karkoschka2001b"/>
| albedo = 0.11 ± 0.1 (at 0.55 μm)<ref name="Karkoschka2001a">{{cite journal|last=Karkoschka|first=Erich|authorlink=Erich Karkoschka|title=Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope|journal=Icarus|volume=151|pages=51–68|year=2001| doi=10.1006/icar.2001.6596|url=http://adsabs.harvard.edu/abs/2001Icar..151...51K}}</ref>
| single_temperature = ~64 [[Kelvin|K]]<ref name=stub1/>
| magnitude = 20.2 <ref name=magnitude>{{cite web|title=Puck Statistics|url=http://www.solarviews.com/eng/puck.htm|accessdate=2007-10-01}}</ref>
}}
[[Image:Puck map (Stooke).jpg|thumb|left|100px|Map of Puck]]
'''Puck''' ({{pronEng|ˈpʌk}} ''puk')'' is an [[inner satellite]] of [[Uranus (planet)|Uranus]]. Puck was discovered from the images taken by ''[[Voyager 2]]'' on [[1985-12-30]], and was given the temporary designation '''S/1985 U 1'''.<ref>{{cite web|last=Smith|first=B.|coauthor=Hansen, C.|title=IAU Circular No. 4159|date=[[January 16]] 1986|url=http://cfa-www.harvard.edu/iauc/04100/04159.html#Item1|accessdate=2006-08-06}}</ref>
In Celtic mythology and English folklore, a ''[[Puck (mythology)|Puck]]'' is a mischievous sprite, imagined as an evil demon by Christians; the moon is named after the Puck who appears in Shakespeare's ''[[A Midsummer Night's Dream]]'', in which he travels around the globe at night with the [[fairy|fairies]]. It is also designated '''Uranus XV'''.<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/append7.html|accessdate=2006-08-06}}</ref>
Puck is the largest of small [[inner satellite]]s of Uranus. It is intermediate in size between [[Portia (moon)|Portia]] and [[Miranda (moon)|Miranda]], the smallest of the five larger satellites. Puck's orbit is also located between these two moons. Little is known about it aside from its orbit,<ref name=Jacobson1998/> its radius about 81 km,<ref name="Karkoschka2001b"/> and its geometric [[albedo]] approximately 0.11.<ref name="Karkoschka2001a"/>
Of the moons discovered by the ''Voyager 2'' imaging team, only Puck was discovered early enough that the probe could be programmed to image it in some detail. Images showed that Puck has a shape of a slightly prolate [[spheroid]] (ratio between axises is 0.97 ± 0.04).<ref name="Karkoschka2001b"/>. Its surface is heavily cratered<ref name=Thomas1987>{{cite journal|last=Thomas|first=P.|coaurhors=Veverka, J.; Johnson, T.V.; et.al|title=Voyager observations of 1985U1|journal=Icarus|year=1987|volume=72|pages=79–83|doi=10.1016/0019-1035(87)90121-7|url=http://adsabs.harvard.edu/abs/1987Icar...72...79T}}</ref> and is grey in color.<ref name="Karkoschka2001b"/> There are three named craters on the surface of Puck. Observations with [[Hubble Space Telescope]] and large terrestrial telescopes found water ice absorption features in the spectrum of Puck.<ref name="Karkoschka2001a"/><ref name=Dumas2003>{{cite journal|last=Dumas|first=Christophe|coaurhors=Smith, Bradford A.; and Terrile, Richard J.|title=Hubble Space Telescope NICMOS Multiband Photometry of Proteus and Puck|journal=Astronomical Journal|year=2003|volume=126|pages=1080–1085|doi=10.1086/375909|url=http://adsabs.harvard.edu/abs/2003AJ....126.1080D}}</ref>
==References==
{{reflist}}
==External links==
[http://solarsystem.nasa.gov/planets/profile.cfm?Object=Ura_Puck Puck Profile] by [http://solarsystem.nasa.gov NASA's Solar System Exploration]
==See also==
*[http://www.strykfoto.org/outericymoons/icymoons.htm Page that includes a reprocessed version of the Voyager Puck image]
*[[List of craters on Puck]]
{{Uranus}}
[[Category:Uranus' moons]]
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