Rosalind (moon)

Rosalind is a closer moon to Uranus. It was found from the images taken by Voyager 2 on January 13, 1986, and was given the designation S/1986 U 4.[5] It was named after the daughter of the banished Duke in William Shakespeare's play As You Like It. It is also designated Uranus XIII.[6]

Rosalind
Discovery
Discovered byStephen P. Synnott / Voyager 2
Discovery dateJanuary 13, 1986
Orbital characteristics
Mean orbit radius
69,926.795 ± 0.053 km[1]
Eccentricity0.00011 ± 0.000103[1]
0.558459529 ± 0.000000019 d[1]
Inclination0.27876 ± 0.045° (to Uranus' equator)[1]
Satellite ofUranus
Physical characteristics
Dimensions72 × 72 × 72 km[2]
Mean radius
36 ± 6 km[2]
~16,000 km²[3]
Volume~200,000 km³[3]
Mass~2.5×1017 kg[3]
Mean density
~1.3 g/cm³ assumed
~0.012 m/s2[3]
~0.031 km/s[3]
synchronous[2]
zero[2]
Albedo0.08 ± 0.01[4]
Temperature~64 K[3]

    Rosalind belongs to Portia Group of moons, which also includes Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Belinda and Perdita.[4] These moons have similar orbits and photometric properties.[4] Unfortunately, other than its orbit,[1] radius of 36 km[2] and geometric albedo of 0.08[4] almost nothing is known about it.

    At the Voyager 2 images Rosalind appears as an almost spherical object. The ratio of axises of the Rosalind's prolate spheroid is 1.0-0.8.[2] Its surface is grey in color.[2]

    References
    1. Jacobson, R.A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations". The Astronomical Journal. 115 (3): 1195–1199. Bibcode:1998AJ....115.1195J. doi:10.1086/300263. S2CID 118616209.
    2. 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.
    3. Calculated on the basis of other parameters
    4. 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.
    5. Smith, B. A. (January 16, 1986). "IAU Circular No. 4164". Retrieved 2006-08-06.
    6. "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 2006-08-06.

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