Juliet (moon)

From Wikipedia, the free encyclopedia
There is also an asteroid called 1285 Julietta.
Juliet
Discovery
Discovered byStephen P. Synnott / Voyager 2
Discovery dateJanuary 3, 1986
Designations
Designation
Uranus XI
Pronunciation/ˈdʒuːliɛt/[1]
AdjectivesJulietian[2]
Orbital characteristics[3]
64,358.222 ± 0.048 km
Eccentricity0.00066 ± 0.000087
0.493065490 ± 0.000000012 d
Inclination0.06546 ± 0.040° (to Uranus' equator)
Satellite ofUranus
Physical characteristics
Dimensions150 × 74 × 74 km[4][note 1]
~30,000 km2[a]
Volume430100±23.0% km3[5]
Mass(3.871±0.891)×1017 kg[5]
Mean density
≥0.61 g/cm3[5]
~0.90 g/cm3 (assumed)
~0.005–0.019 m/s2[a]
~0.026–0.037 km/s[a]
synchronous[4]
zero[4]
Albedo0.08 ± 0.01[6]
Temperature~64 K[a]
  1. ^ Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.

Juliet is an inner satellite of Uranus. It was discovered from the images taken by Voyager 2 on 3 January 1986, and was given the temporary designation S/1986 U 2.[7] It is named after the heroine of William Shakespeare's play Romeo and Juliet. It is also designated Uranus XI.[8]

Juliet belongs to the Portia group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Rosalind, Cupid, Belinda and Perdita.[6] These satellites have similar orbits and photometric properties.[6] Other than its orbit,[3] size of 150 × 74 km[4] and geometric albedo of 0.08,[6] virtually nothing is known about Juliet.

In the Voyager 2 images Juliet appears as an elongated object, the major axis pointing towards Uranus. The ratio of axes of Juliet's prolate spheroid is 0.5 ± 0.3, which is rather an extreme value.[4] Its surface is grey in color.[4]

Juliet may collide with Desdemona within the next 100 million years.[9]

See also[edit]

Notes[edit]

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

References[edit]

  1. ^ Benjamin Smith (1903). The Century Dictionary and Cyclopedia.
  2. ^ W. M. Anderson (1892). "Daniel Johnson Brimm". Shield and Diamond. Vol. 2, no. 1. p. 116.
  3. ^ 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.
  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.
  5. ^ a b c 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.
  6. ^ 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.
  7. ^ Smith, B. A. (January 16, 1986). "Satellites of Uranus". IAU Circular. 4164. Retrieved 29 October 2011.
  8. ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.
  9. ^ Duncan, Martin J.; Lissauer, Jack J. (1997). "Orbital Stability of the Uranian Satellite System". Icarus. 125 (1): 1–12. Bibcode:1997Icar..125....1D. doi:10.1006/icar.1996.5568.

External links[edit]

Retrieved from "https://en.wikipedia.org/w/index.php?title=Juliet_(moon)&oldid=1213961801"