Juliet (moon)

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Juliet
Discovery
Discovered byStephen P. Synnott / Voyager 2
Discovery dateJanuary 3, 1986
Orbital characteristics
64,358.222 ± 0.048 km[1]
Eccentricity0.00066 ± 0.000087[1]
0.493065490 ± 0.000000012 d[1]
Inclination0.06546 ± 0.040° (to Uranus' equator)[1]
Satellite ofUranus
Physical characteristics
Dimensions150 × 74 × 74 km[2]
Mean radius
53 ± 4 km[2]
~35,000 km²[3]
Volume~632,000 km³[3]
Mass~8.2×1017 kg[3]
Mean density
~1.3 g/cm³ assumed
~0.016 m/s2[3]
~0.040 km/s[3]
synchronous[2]
zero[2]
Albedo0.08 ± 0.01[4]
Temperature~64 K[3]
Discovery image of Juliet

Juliet is a closer moon to Uranus. It was found from the images taken by Voyager 2 on 1986-01-03, and was given the designation S/1986 U 2.[5] It is named after the heroine of William Shakespeare's play Romeo and Juliet. It is also designated Uranus XI.[6]

Juliet belongs to Portia Group of moons, which also includes Bianca, Cressida, Desdemona, Portia, Rosalind, Cupid, Belinda and Perdita.[4] These moons have similar orbits and photometric properties.[4] Unfortunately, other than its orbit,[1] radius of 53 km[2] and geometric albedo of 0.08[4] almost nothing is known about it.

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

References[change | change source]

  1. 1.0 1.1 1.2 1.3 1.4 Jacobson, R.A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations". The Astronomical Journal 115: 1195-1199. doi:10.1086/300263. http://adsabs.harvard.edu/abs/1998AJ....115.1195J. 
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites". Icarus 151: 69–77. doi:10.1006/icar.2001.6597. http://adsabs.harvard.edu/abs/2001Icar..151...69K. 
  3. 3.0 3.1 3.2 3.3 3.4 3.5 Calculated on the basis of other parameters
  4. 4.0 4.1 4.2 4.3 Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope". Icarus 151: 51–68. doi:10.1006/icar.2001.6596. http://adsabs.harvard.edu/abs/2001Icar..151...51K. 
  5. Smith, B. A. (January 16 1986). "IAU Circular No. 4164". Retrieved 2006-08-06. Check date values in: |date= (help)
  6. "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21 2006. Retrieved 2006-08-06. Check date values in: |date= (help)

Other websites[change | change source]