Bianca (moon)
- There is also an asteroid called 218 Bianca.
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Discovery
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| Discovered by | Bradford A. Smith / Voyager 2 |
| Discovery date | January 23, 1986 |
| 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 |
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Physical characteristics
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| 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. Originally, it was to be called Peaseblossom after a fairy in Shakespeare's A Midsummer Night's Dream, but due to a nomenclature conflict between the USA and the USSR the name Bianca was quietly chosen by the IAU a few years after the moon's discovery. 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]
[edit] See also
[edit] References
Explanatory notes
Citations
- ^ 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.
- ^ 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.
- ^ a b c "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. http://ssd.jpl.nasa.gov/?sat_phys_par. Retrieved 12 December 2008.
- ^ a b Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). http://nssdc.gsfc.nasa.gov/planetary/factsheet/uraniansatfact.html. Retrieved 12 December 2008.
- ^ 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.
- ^ Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular 4168. http://www.cbat.eps.harvard.edu/iauc/04100/04168.html#Item1. Retrieved 2011-10-31.
- ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. http://planetarynames.wr.usgs.gov/append7.html. Retrieved 6 August 2006.
[edit] External links
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