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Bianca (satélite)

No debe confundirse con (218) Bianca.
Bianca

Bianca orbitando Urano.
Descubrimiento
Descubridor Bradford A. Smith
Fecha 23 de enero de 1986
Lugar Voyager 2
Designaciones Urano VIII
Nombre provisional S/1986 U 9
Categoría satélite natural
Orbita a Urano
Elementos orbitales
Inclinación 0.19308 ± 0.054° (ecuador de Urano)[1]​
Semieje mayor 59 165 km[1]​
Excentricidad 0.00092 ± 0.000118[1]​
Características físicas
Masa ~9.2×1016 kg (calculado)
Volumen ~71 000 km3 (calculado)
Dimensiones 64 × 46 × 46 km[3]​
Densidad ~1.3 g/cm3 (asumido)[2]​
Área de superficie ~8 300 km2 (calculado)
Diámetro 25.7 ± 2 km[3]​[2]​[4]​
Gravedad ~0.0086 m/s2 (calculado)
Velocidad de escape ~0.022 km/s (calculado)
Periodo de rotación 0.434578986 días[1]​
Albedo 0.08 ± 0.01[5]​
Características atmosféricas
Temperatura ~64 K (calculado)
Cuerpo celeste
Anterior Ofelia
Siguiente Crésida
[editar datos en Wikidata]

Bianca (bee-aang'-kə, IPA biːˈɑŋkə) es un satélite natural de Urano. Fue descubierto a partir de imágenes tomadas por la sonda espacial Voyager 2 el 23 de enero de 1986, y le fue dada la designación temporal S/1986 U 9, aunque también se designa Urano VIII.[6]​[7]​ Su nombre proviene de Bianca, la hermana de Katherine en la obra La fierecilla domada de William Shakespeare.

Bianca pertenece al grupo de Porcia, que incluye a Crésida, Desdémona, Julieta, Porcia, Rosalinda, Cupido, Belinda y Perdita.[5]​ Estos satélites poseen órbitas y propiedades fotométricas similares. Desafortunadamente, aparte de su órbita,[1]​ su radio de 27 km[3]​ y su albedo geométrico de 0,08[5]​ nada se sabe de este satélite.

En las imágenes de la Voyager 2, Bianca aparece como un objeto alargado, con el eje principal apuntando hacia Urano. La proporción de ejes del esferoide alargado de Bianca es de 0,7 ± 0,2.[3]​ Su superficie es de color gris.[3]​

Véase también

Referencias

  1. ↑ 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. S2CID 118616209. doi:10.1086/300263. 
  2. ↑ a b «Planetary Satellite Physical Parameters». JPL (Solar System Dynamics). 24 de octubre de 2008. Archivado desde el original el 17 de enero de 2009. Consultado el 12 de diciembre de 2008. 
  3. ↑ a b c d e 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. 
  4. ↑ Williams, Dr. David R. (23 de noviembre de 2007). «Uranian Satellite Fact Sheet». NASA (National Space Science Data Center). Consultado el 12 de diciembre de 2008. 
  5. ↑ 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. 
  6. ↑ «Planet and Satellite Names and Discoverers». Gazetteer of Planetary Nomenclature. USGS Astrogeology. 21 de julio de 2006. Consultado el 6 de agosto de 2006. 
  7. ↑ Smith, B. A. (27 de enero de 1986). «IAU Circular No. 4168». Consultado el 6 de agosto de 2006. 

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