Bianca (moon)

Bianca
Discovery
Discovered by	Bradford A. Smith / Voyager 2
Discovery date	January 23, 1986
Designations
Designation	Uranus VIII
Pronunciation	/biˈæŋkə/
Adjectives	Biancan
Orbital characteristics
Semi-major axis	59165.550±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
Surface area	~8400 km2
Volume	70900±29.9% km3
Mass	(6.38±1.91)×1016 kg
Mean density	≥0.79 g/cm3; 0.90 g/cm3 (assumed)
Surface gravity	~0.004–0.008 m/s2
Escape velocity	~0.016–0.019 km/s
Synodic rotation period	synchronous
Axial tilt	zero
Albedo	0.08 ± 0.01; 0.07
Temperature	~64 K
	^ Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension. ;

There is also an asteroid called 218 Bianca.

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.^[9] It was named after the sister of Katherine in Shakespeare's play The Taming of the Shrew. It is also designated Uranus VIII.^[10]

Bianca belongs to the Portia group of satellites, which also includes Cressida, Desdemona, Juliet, Portia, Rosalind, Cupid, Belinda, and Perdita.^[6] These satellites have similar orbits and photometric properties.^[6] Other than its orbit,^[3] size of 64 × 46 km,^[4] and geometric albedo of 0.08,^[6] virtually nothing 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]

Notes

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

References

^ Benjamin Smith (1903). The Century Dictionary and Cyclopedia.
^ Ruud (2008). Critical companion to Dante: a literary reference to his life and work.
^ ^a ^b 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.
^ ^a ^b ^c ^d ^e ^f 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 ^d 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.
^ ^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.
^ "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008.
^ Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 2008.
^ 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

[5] Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.

[calculated-6] Calculated on the basis of other parameters.

[1] Benjamin Smith (1903). The Century Dictionary and Cyclopedia.

[2] Ruud (2008). Critical companion to Dante: a literary reference to his life and work.

[Jacobson_1998-3] 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. S2CID 118616209.

[Karkoschka,_Voyager_2001-4] ^ ^a ^b ^c ^d ^e ^f 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.

[FrenchEtAl2024-7] 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.

[Karkoschka,_Hubble_2001-8] 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.

[JPL-SSD-sat_phys-9] "Planetary Satellite Physical Parameters". JPL (Solar System Dynamics). 24 October 2008. Archived from the original on 17 January 2009. Retrieved 12 December 2008.

[Williams_2007_nssdc-10] Williams, Dr. David R. (23 November 2007). "Uranian Satellite Fact Sheet". NASA (National Space Science Data Center). Retrieved 12 December 2008.

[IAUC_4168-11] Smith, B. A. (1986-01-27). "Satellites and Rings of Uranus". IAU Circular. 4168. Retrieved 2011-10-31.

[Gazetteer-12] "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.

[1]

[2]

[3]

[4]

[note 1]

[a]

[5]

[6]

[7]

[8]

[9]

[10]

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Discovery

Discovered by	Bradford A. Smith / Voyager 2
Discovery date	January 23, 1986
Designations
Designation	Uranus VIII
Pronunciation	/biˈæŋkə/^[1]
Adjectives	Biancan^[2]
Orbital characteristics^[3]
Semi-major axis	59165.550±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^[4]^{[note 1]}
Surface area	~8400 km²^[a]
Volume	70900±29.9% km³^[5]
Mass	(6.38±1.91)×10¹⁶ kg^[5]
Mean density	≥0.79 g/cm³^[5] 0.90 g/cm³ (assumed)^[5]
Surface gravity	~0.004–0.008 m/s²^[a]
Escape velocity	~0.016–0.019 km/s^[a]
Synodic rotation period	synchronous^[4]
Axial tilt	zero^[4]
Albedo	0.08 ± 0.01^[6] 0.07^[7]^[8]
Temperature	~64 K^[a]
^ Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.

Bianca (moon)

See also

Notes

References

External links