Bianca (moon)
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Bianca Moon
There is also an asteroid called 218 Bianca.
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
25.7 ± 2 km[2][3][4]
~8300 km²[a]
Volume~71,000 km³[a]
Mean density
~1.3 g/cm³ (assumed)[3]
~0.0086 m/s²[a]
~0.022 km/s[a]
Temperature~64 K[a]

Bianca ( bee-AHNG-k?) is an inner satellite of Uranus. It was discovered from the images taken by Voyager 2 on January 23, 1986, and was given the temporary designation S/1986 U 9.[6] It was named after the sister of Katherine in Shakespeare's play The Taming of the Shrew. It is also designated Uranus VIII.[7]

Bianca belongs to Portia Group of satellites, which also includes Cressida, Desdemona, Juliet, Portia, Rosalind, Cupid, Belinda and Perdita.[5] These satellites have similar orbits and photometric properties.[5] Other than its orbit,[1] radius of 27 km,[2] and geometric albedo of 0.08[5] virtually nothing is known about it.

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

See also


Explanatory notes

  1. ^ a b c d e f Calculated on the basis of other parameters.


  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. doi:10.1086/300263.
  2. ^ a b c d e f g 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.
  3. ^ a b c "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 2008.
  4. ^ a b Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 2008.
  5. ^ a b c d 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. ^ Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular. 4168. Retrieved .
  7. ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 2006.

External links

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