Bianca (moon)

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There is also an asteroid called 218 Bianca.
Bianca
Biancamoon.png
Discovery
Discovered by Bradford A. Smith / Voyager 2
Discovery dateJanuary 23, 1986
Designations
Designation
Uranus VIII
Pronunciation /biˈæŋkə/ [1]
Adjectives Biancan [2]
Orbital characteristics [3]
59165.550±0.045 km
Eccentricity 0.00092 ± 0.000118
0.434578986 ± 0.000000022 d
Inclination 0.19308 ± 0.054° (to Uranus's equator)
Satellite of Uranus
Physical characteristics
Dimensions 64 × 46 × 46 km [4] [note 1]
~8400 km2 [a]
Volume 70900 km3 ± 29.9% [5]
Mass (6.38±1.91)×1016  kg [5]
Mean density
0.5–1.2 g/cm3 [6]
0.9 g/cm3 (assumed) [5]
synchronous [4]
zero [4]
Albedo 0.08 ± 0.01 [7]
0.07 [8] [9]
22.52 (at opposition)
  1. ↑ Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.

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. [10] It was named after the sister of Katherine in Shakespeare's play The Taming of the Shrew . It is also designated Uranus VIII. [11]

Contents

Bianca belongs to the 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] size of 64 km × 46 km (40 mi × 29 mi), [4] and geometric albedo of 0.08, [7] little is known about it.

In Voyager 2 images Bianca appears as an elongated object, with its 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

Notes

  1. ↑ Calculated on the basis of other parameters.

References

  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. 1 2 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 . S2CID   118616209.
  4. 1 2 3 4 5 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 (1): 69–77. Bibcode:2001Icar..151...69K. doi:10.1006/icar.2001.6597.
  5. 1 2 3 French, Richard G.; Hedman, Matthew M.; Nicholson, Philip D.; Longaretti, Pierre-Yves; McGhee-French, Colleen A. (2024-03-15). "The Uranus system from occultation observations (1977–2006): Rings, pole direction, gravity field, and masses of Cressida, Cordelia, and Ophelia". Icarus. 411 115957. arXiv: 2401.04634 . doi:10.1016/j.icarus.2024.115957. ISSN   0019-1035.
  6. ↑ French, Robert S.; Showalter, Mark R. (August 2012). "Cupid is Doomed: An Analysis of the Stability of the Inner Uranian Satellites". Icarus. 220 (2): 911–921. arXiv: 1408.2543 . Bibcode:2012Icar..220..911F. doi:10.1016/j.icarus.2012.06.031.
  7. 1 2 3 4 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. ↑ "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008.
  9. ↑ Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 2008.
  10. ↑ Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular. 4168. Retrieved 2011-10-31.
  11. ↑ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.
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