Bianca (moon)

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There is also an asteroid called 218 Bianca.
Bianca
Bianca
Discovery
Discovered by Bradford A. Smith / Voyager 2
Discovery date January 23, 1986
Orbital characteristics
Mean orbit radius 59,165.550 ± 0.045 km[1]
Eccentricity 0.00092 ± 0.000118[1]
Orbital period 0.434578986 ± 0.000000022 d[1]
Inclination 0.19308 ± 0.054° (to Uranus' equator)[1]
Satellite of Uranus
Physical characteristics
Dimensions 64 × 46 × 46 km[2]
Mean radius 25.7 ± 2 km[2][3][4]
Surface area ~8300 km²[a]
Volume ~71,000 km³[a]
Mass ~9.2×1016 kg[a]
Mean density ~1.3 g/cm³ (assumed)[3]
Equatorial surface gravity ~0.0086 m/s²[a]
Escape velocity ~0.022 km/s[a]
Rotation period synchronous[2]
Axial tilt zero[2]
Albedo
Temperature ~64 K[a]

Bianca (/biˈɑːŋkə/ bee-AHNG-kə) 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[edit]

References[edit]

Explanatory notes

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

Citations

  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.  edit
  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.  edit
  3. ^ a b c "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008. 
  4. ^ a b Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 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.  edit
  6. ^ Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular 4168. Retrieved 2011-10-31. 
  7. ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006. 

External links[edit]