Bianca (moon)

See also: Bianca (disambiguation)
There is also an asteroid called 218 Bianca.
Bianca
Discovery
Discovered byBradford A. Smith / Voyager 2
Discovery dateJanuary 23, 1986
Designations
Designation
Uranus VIII
Pronunciation/biˈæŋkə/[1]
AdjectivesBiancan[2]
Orbital characteristics[3]
59165.550±0.045 km
Eccentricity0.00092 ± 0.000118
0.434578986 ± 0.000000022 d
Inclination0.19308 ± 0.054° (to Uranus' equator)
Satellite ofUranus
Physical characteristics
Dimensions64 × 46 × 46 km[4][note 1]
~8400 km2[a]
Volume70900±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]
Albedo0.08 ± 0.01[6]
0.07[7][8]
Temperature~64 K[a]
  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.[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]

  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. ^ a b Cite error: The named reference Jacobson 1998 was invoked but never defined (see the help page).
  4. ^ a b c d e f Cite error: The named reference Karkoschka, Voyager 2001 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference FrenchEtAl2024 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Karkoschka, Hubble 2001 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference JPL-SSD-sat_phys was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Williams 2007 nssdc was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference IAUC 4168 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Gazetteer was invoked but never defined (see the help page).


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