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Moon of Uranus From Wikipedia, the free encyclopedia
Rosalind is an inner satellite of Uranus. It was discovered from the images taken by Voyager 2 on 13 January 1986, and was given the temporary designation S/1986 U 4.[9] 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.[10]
Discovery | |
---|---|
Discovered by | Stephen P. Synnott / Voyager 2 |
Discovery date | January 13, 1986 |
Designations | |
Designation | Uranus XIII |
Pronunciation | /ˈrɒzələnd/[1] |
Adjectives | Rosalindian /rɒzəˈlɪndiən/[2] |
Orbital characteristics[3] | |
69,926.795 ± 0.053 km | |
Eccentricity | 0.00011 ± 0.000103 |
0.558459529 ± 0.000000019 d | |
Inclination | 0.27876 ± 0.045° (to Uranus' equator) |
Satellite of | Uranus |
Group | ring shepherd |
Physical characteristics | |
Dimensions | 72 × 72 × 72 km[4][note 1] |
36 ± 6 km[5][6] | |
~16 000 km2[lower-alpha 1] | |
Volume | ~200 000 km3[lower-alpha 1] |
Mass | ~(0.98–2.3)×1017 kg[lower-alpha 1] |
Mean density | 0.5–1.2 g/cm3[7] |
~0.005–0.012 m/s2[lower-alpha 1] | |
~0.019–0.029 km/s[lower-alpha 1] | |
synchronous[4] | |
zero[4] | |
Albedo | 0.08 ± 0.01[8] |
Temperature | ~64 K[lower-alpha 1] |
|
Rosalind belongs to Portia group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Belinda, and Perdita.[8] These satellites have similar orbits and photometric properties.[8] Other than its orbit,[3] radius of 36 km,[4] and geometric albedo of 0.08,[8] virtually nothing is known about Rosalind.
In Voyager 2 imagery, Rosalind appears as an almost spherical object. The ratio of axes of Rosalind's prolate spheroid is 0.8–1.0.[4] Its surface is grey in color.[4]
Rosalind is very close to a 3:5 orbital resonance with Cordelia.[11]
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