Bianca (moon)

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
Eccentricity	0.00092 ± 0.000118
Orbital period (sidereal)	0.434578986 ± 0.000000022 d
Inclination	0.19308 ± 0.054° (to Uranus' equator)
Satellite of	Uranus
Physical characteristics
Dimensions	64 × 46 × 46 km
Mean radius	25.7 ± 2 km
Surface area	~8300 km²
Volume	~71,000 km³
Mass	~9.2×1016 kg
Mean density	~1.3 g/cm³ (assumed)
Surface gravity	~0.0086 m/s²
Escape velocity	~0.022 km/s
Synodic rotation period	synchronous
Axial tilt	zero
Albedo	0.08 ± 0.01; 0.07;
Temperature	~64 K

There is also an asteroid called 218 Bianca.

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]

References

Explanatory notes

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

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. {{cite journal}}: Invalid |ref=harv (help)
^ ^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. Archived from the original on 17 January 2009. Retrieved 12 December 2008. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)
^ ^a ^b Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). 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. Retrieved 2011-10-31.
^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.

External links

[calculated-5] ^ ^a ^b ^c ^d ^e ^f Calculated on the basis of other parameters.

[Jacobson_1998-1] 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. {{cite journal}}: Invalid |ref=harv (help)

[Karkoschka,_Voyager_2001-2] ^ ^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.

[JPL-SSD-sat_phys-3] "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008. {{cite web}}: Unknown parameter |deadurl= ignored (|url-status= suggested) (help)

[Williams_2007_nssdc-4] Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 2008.

[Karkoschka,_Hubble_2001-6] 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.

[IAUC_4168-7] Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular. 4168. Retrieved 2011-10-31.

[Gazetteer-8] "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.

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References

External links