Mab (lúa): Diferenzas entre revisións

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{| class="infobox" style="width: 300px; font-size: 11px;"
|+ style="font-size:larger;" | '''Mab'''
|-
| colspan="2" align="center"| [[Ficheiro:Uranus-Portia-Cressida-Ophelia-NASA.gif|240px|Crésida]]
|-
! colspan="2" align="center" style="font-size: 9px"|Imaxe tomada pola Voyager 2 da lúa de Urano, [[Portia (lúa)|Portia]], Crésida, e [[Ofelia (lúa)|Ofelia]]
|-
! bgcolor="#ffc0c0" colspan="2" align="center"| Descubrimento
|-
! align="left" | Descuberta por
| [[StephenMark PR. SynnottShowalter]] /e ''[[VoyagerJack 2J. Lissauer]]''
|-
! align="left" | Descuberta en
| 925 de xaneiroagosto dedo 19862003
|-
! bgcolor="#ffc0c0" colspan="2" align="center"| Características orbitais
|-
! align="left"| [[RadioSemi-eixo]] orbital mediomaior
| 97.736 km
| 61.766,730 ± 0,046 km<ref name=Jacobson1998>{{cita publicación periódica|autor=Jacobson; R.A.|título=The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations|revista=The Astronomical Journal|url=http://adsabs.harvard.edu/abs/1998AJ....115.1195J|ano=1998|volume=115|páxinas=1195–1199|doi=10.1086/300263}}</ref>
|-
! align="left"| [[Excentricidade (orbital)|Excentricidade]]
| 0,0025
| 0,00036 ± 0,00011<ref name=Jacobson1998/>
|-
! align="left"| [[Período orbital]]
| 0,463569601 ± 0,000000013923 [[día|d]]<ref name=Jacobson1998/>
|-
! align="left"| [[Inclinación]]
| 0,006 ± 0,0401335° (respecto do ecuador de Urano)<ref name=Jacobson1998/>
|-
! align="left" | é [[satélite natural|satélite]] de
Liña 41 ⟶ 37:
|-
! align="left" | [[Radio]] medio
| 39,8 ± 2 ~24&nbsp;km<ref name="Karkoschka2001bShowalter"/><ref name=jplssd>{{Citacita publicación Webperiódica
| firstautor=Mark R. | last=Showalter
|url=http://ssd.jpl.nasa.gov/?sat_phys_par
| coauthorscoautores=Lissauer, Jack J.
|autor=[[JPL]] (Solar System Dynamics)
| titletítulo=The Second Ring-Moon System of Uranus: Discovery and Dynamics
|título=Planetary Satellite Physical Parameters
| journalrevista=Science Express
|data=24 de outubro do 2008
| data=2322-1112-20072005
|dataacceso=12-12-2008}}</ref><ref name=nssdc>{{Cita Web
| doi=10.1126/science.1122882
|título=Uranian Satellite Fact Sheet
| url=http://www.sciencemag.org/cgi/content/abstract/1122882v1
|editor=[[NASA]] (National Space Science Data Center)
| volume=311
|autor = Williams, Dr. David R.
| pagespáxinas=973
|url=http://nssdc.gsfc.nasa.gov/planetary/factsheet/uraniansatfact.html
| pmid=16373533
|data=23-11-2007
|dataacceso=12-12-2008}}</ref>
|-
! align="left" | [[Área]] superficial
| ~1.900 km²
| ~20.000 km²<ref name=stub1>Calculado en base a outros parámetros</ref>
|-
! align="left" | Volume
| ~2608.000 km³<ref name=stub1/>
|-
! align="left" | [[Masa]]
| ~3,41 x 10<sup>1716</sup> [[quilogramo|kg]]<ref name=stub1/>
|-
! align="left" | [[Densidade]] media
| 1,3 g/cm<sup>3</sup> (estimada)<ref name="jplssd"/>
|-
! align="left" | [[Gravidade|Gravidade superficial]]
| ~0,013004 [[Aceleración|m/s<sup>2</sup>]]<ref name=stub1/>
|-
! align="left" | [[Velocidade de escape]]
| ~0,034011 km/s<ref name=stub1/>
|-
! align="left" | [[Día sideral|Período de rotación]]
| [[rotación sincrónica|sincrónica]]<ref name="Karkoschka2001b"/>
|-
! align="left" | [[Oblicuidade da eclíptica]]
| cero
| cero<ref name="Karkoschka2001b"/>
|-
! align="left" | [[Albedo]]
| 0,103 (asumido)
| 0,08 ± 0,01<ref name="Karkoschka2001a">{{cita publicación periódica|autor=Erich Karkoschka|ligazónauto=Erich Karkoschka|título=Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope|revista=Icarus|volume=151|páxinas=51–68|ano=2001| doi=10.1006/icar.2001.6596|url=http://adsabs.harvard.edu/abs/2001Icar..151...51K}}</ref><br>0.07<ref name=jplssd/><ref name=nssdc/>
|-
! align="left" | [[Temperatura]] superficial
| ~6463 [[Kelvin|K]]<ref name=stub1/>
|-
! align="left" | [[Magnitude aparente]]
| magnitude = 14.,5<ref name=magnitude>{{citeCita webWeb|titletítulo=Classic Satellites of the Solar System|url=http://www.oarval.org/ClasSaten.htm|publisher=Observatorio ARVAL|accessdatedataacceso=200728-09-282007}}</ref>
|}
 
'''Mab''' is an [[inner satellite]] of [[Uranus]]. It was discovered by [[Mark R. Showalter]] and [[Jack J. Lissauer]] in [[2003]] using the [[Hubble Space Telescope]].<ref name="IAUC8209">{{citeCita webWeb
 
| autor = WilliamsShowalter, DrM. David R.
 
| coauthorscoautores = Lissauer, J. J.
{{Infobox Planet
| titletítulo = IAU Circular No. 8209
| name = Mab
| data = 25-09-2003
| alt_names =
| adjectives =
| image =
| caption =
| bgcolour = #a0ffa0
| discovery = yes
| discoverer = [[Mark R. Showalter]] and [[Jack J. Lissauer]]
| discovered = [[August 25]], [[2003]]
| semimajor = 97,736 [[Kilometre|km]]
| orbital_speed =
| eccentricity = 0.0025
| period = 0.923 [[Day|d]]
| inclination = 0.1335° (to Uranus' equator)
| satellite_of = [[Uranus]]
| physical_characteristics = yes
| mean_radius = ~24&nbsp;km<ref name="Showalter">{{cite journal
| first=Mark R. | last=Showalter
| coauthors=Lissauer, Jack J.
| title=The Second Ring-Moon System of Uranus: Discovery and Dynamics
| journal=Science Express
| date=2005-12-22
| doi=10.1126/science.1122882
| url=http://www.sciencemag.org/cgi/content/abstract/1122882v1
| volume=311
| pages=973
| pmid=16373533
}}</ref>
| surface_area = ~1,900 [[square kilometre|km<sup>2</sup>]]
| volume = ~8,000 [[cubic kilometre|km<sup>3</sup>]]
| mass = ~1{{Esp|16}} [[kilogram|kg]]
| density = ~1.3 [[Gram|g]]/[[Cubic centimeter|cm³]]
| surface_grav = ~0.0044 [[Acceleration|m/s²]]
| escape_velocity = ~0.011 km/s
| rotation = zero ([[Synchronous rotation|synchronous]])
| axial_tilt = 0
| albedo = 0.103 ''(assumed)''
| magnitude = 14.5<ref name=magnitude>{{cite web|title=Classic Satellites of the Solar System|url=http://www.oarval.org/ClasSaten.htm|publisher=Observatorio ARVAL|accessdate=2007-09-28}}</ref>
| single_temperature = ~63 [[Kelvin|K]]
}}
 
'''Mab''' is an [[inner satellite]] of [[Uranus]]. It was discovered by [[Mark R. Showalter]] and [[Jack J. Lissauer]] in [[2003]] using the [[Hubble Space Telescope]].<ref name="IAUC8209">{{cite web
| last = Showalter
| first = M. R.
| coauthors = Lissauer, J. J.
| title = IAU Circular No. 8209
| date = [[September 25]] 2003
| url = http://cfa-www.harvard.edu/iauc/08200/08209.html
| accessdatedataacceso = 200605-08-052006 }}</ref> It was named after [[Queen Mab]], a fairy queen from English folklore who is mentioned in [[William Shakespeare]]'s play ''[[Romeo and Juliet]]''.<ref name="Gazetteer">{{Cita Web| título=Planet and Satellite Names and Discoverers|obra=Gazetteer of Planetary Nomenclature|editor=USGS Astrogeology|data=21-07-2006 |url=http://planetarynames.wr.usgs.gov/append7.html |dataacceso=06-08-2006}}</ref>
 
Because the moon is small and dark, it was not seen in the heavily scrutinized images taken by ''[[Voyager 2]]'' during its Uranus flyby in [[1986]]. However, it is brighter than another moon, [[Perdita (moon)|Perdita]], which was discovered from Voyager's photos in [[1997]]. This led scientists to re-examine the old photos again, and the satellite was finally [[recovery|found]] in the images.<ref name="Showalter"/>
Liña 144 ⟶ 98:
Mab is heavily [[perturbation (astronomy)|perturbed]]. The actual source for perturbation is still unclear, but is presumed to be one or more of the nearby orbiting moons.<ref name="Showalter"/>
 
Mab orbits at the same distance from Uranus as [[R/2003 U 1]], a newly discovered dusty [[planetary ring|ring]]. The moon is nearly the optimal size for dust production, since larger moons can recollect the escaping dust and smaller moons have too small surface areas for supplying the ring via ring particle or [[meteoroid]] collisions.<ref name=mabchaos>{{citeCita webWeb
|datedata=December 28, -12-2005
|titletítulo=Uranus' second ring-moon system
|publishereditor=Astronomy Magazine
|authorautor=Laura Layton
|url=http://www.astronomy.com/asy/default.aspx?c=a&id=3821
|accessdatedataacceso=200810-05-102008}}</ref> No rings associated to Perdita and Cupid have been found, probably because [[Belinda (moon)|Belinda]] limits the lifetimes of dust they generate.<ref name="Showalter"/>
 
Following its discovery, Mab was given the temporary designation '''S/2003 U 1'''.<ref name="IAUC8209"/> The moon is also designated '''Uranus XXVI'''.<ref name="Gazetteer"/>