- 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]
 | |
| 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] | |
| 59165.550±0.045 km | |
| Eccentricity | 0.00092 ± 0.000118 |
| 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] |
| ~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] |
| ~0.004–0.008 m/s2[a] | |
| ~0.016–0.019 km/s[a] | |
| synchronous[4] | |
| zero[4] | |
| Albedo | 0.08 ± 0.01[6] 0.07[7][8] |
| Temperature | ~64 K[a] |
| |
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, 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 edit
Notes edit
References edit
- ^ 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.