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Bianca (moon)

moon of Uranus

Bianca is a closer moon to Uranus. It was found from the images taken by Voyager 2 on 1986-01-23, and was given the designation S/1986 U 9.[5] It was named after the sister of Katherine in Shakespeare's play The Taming of the Shrew. It is also designated Uranus VIII.[6]

Bianca
Discovery
Discovered byBradford A. Smith / Voyager 2
Discovery dateJanuary 23, 1986
Orbital characteristics
Mean orbit radius
59,165.550 ± 0.045 km[1]
Eccentricity0.00092 ± 0.000118[1]
0.434578986 ± 0.000000022 d[1]
Inclination0.19308 ± 0.054° (to Uranus' equator)[1]
Satellite ofUranus
Physical characteristics
Dimensions64 × 46 × 46 km[2]
Mean radius
27 ± 2 km[2]
~8300 km²[3]
Volume~71,000 km³[3]
Mass~9.2×1016 kg[3]
Mean density
~1.3 g/cm³ (assumed)
~0.0086 m/s2[3]
~0.022 km/s[3]
synchronous[2]
zero[2]
Albedo0.08 ± 0.01 [4]
Temperature~64 K[3]
Bianca orbiting Uranus

Bianca belongs to Portia Group of moons, which also includes Cressida, Desdemona, Juliet, Portia, Rosalind, Cupid, Belinda and Perdita.[4] These moons have similar orbits and photometric properties.[4] Other than its orbit,[1] radius of 27 km[2] and geometric albedo of 0.08[4] almost nothing is known about it.

At the Voyager 2 images Bianca appears as a stretched object, the major axis pointing towards Uranus. The ratio of axises of the Bianca's prolate spheroid is 0.7 ± 0.2.[2] Its surface is grey in color.[2]

ReferencesEdit

  1. 1.0 1.1 1.2 1.3 1.4 Jacobson, R.A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations". The Astronomical Journal 115: 1195-1199. doi:10.1086/300263. http://adsabs.harvard.edu/abs/1998AJ....115.1195J. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites". Icarus 151: 69–77. doi:10.1006/icar.2001.6597. http://adsabs.harvard.edu/abs/2001Icar..151...69K. 
  3. 3.0 3.1 3.2 3.3 3.4 3.5 Calculated on the basis of other parameters
  4. 4.0 4.1 4.2 4.3 Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope". Icarus 151: 51–68. doi:10.1006/icar.2001.6596. http://adsabs.harvard.edu/abs/2001Icar..151...51K. 
  5. Smith, B. A. (January 27, 1986). "IAU Circular No. 4168". Retrieved 2006-08-06.
  6. "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 2006-08-06.

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