Bianca (moon)

Bianca 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.[8] It was named after the sister of Katherine in Shakespeare's play The Taming of the Shrew. It is also designated Uranus VIII.[9]

See also: Bianca (disambiguation)
There is also an asteroid called 218 Bianca.
Bianca
Discovery
Discovered byBradford A. Smith / Voyager 2
Discovery dateJanuary 23, 1986
Designations
Designation
Uranus VIII
Pronunciation/biˈæŋkə/[1]
AdjectivesBiancan[2]
Orbital characteristics
Mean orbit radius
59,165.550 ± 0.045 km[3]
Eccentricity0.00092 ± 0.000118[3]
0.434578986 ± 0.000000022 d[3]
Inclination0.19308 ± 0.054° (to Uranus' equator)[3]
Satellite ofUranus
Physical characteristics
Dimensions64 × 46 × 46 km[4]
Mean radius
25.7 ± 2 km[4][5][6]
~8300 km²[lower-alpha 1]
Volume~71,000 km³[lower-alpha 1]
Mass~9.2×1016 kg[lower-alpha 1]
Mean density
~1.3 g/cm³ (assumed)[5]
~0.0086 m/s²[lower-alpha 1]
~0.022 km/s[lower-alpha 1]
synchronous[4]
zero[4]
Albedo
Temperature~64 K[lower-alpha 1]

    Bianca belongs to Portia Group of satellites, which also includes Cressida, Desdemona, Juliet, Portia, Rosalind, Cupid, Belinda and Perdita.[7] These satellites have similar orbits and photometric properties.[7] Other than its orbit,[3] radius of 27 km,[4] and geometric albedo of 0.08[7] 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.[4] Its surface is grey in color.[4]

    See also

    References

    Explanatory notes

    1. Calculated on the basis of other parameters.

    Citations

    1. Benjamin Smith (1903) The Century Dictionary and Cyclopedia
    2. Ruud (2008) Critical companion to Dante: a literary reference to his life and work
    3. 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.
    4. 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.
    5. "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008.
    6. Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 2008.
    7. 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.
    8. Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular. 4168. Retrieved 2011-10-31.
    9. "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.
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