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]
Discovery | |
---|---|
Discovered by | Stephen P. Synnott / Voyager 2 |
Discovery date | January 3, 1986 |
Designations | |
Designation | Uranus XI |
Pronunciation | /ˈdʒuːliɛt/[1] |
Adjectives | Julietian[2] |
Orbital characteristics[3] | |
64,358.222 ± 0.048 km | |
Eccentricity | 0.00066 ± 0.000087 |
0.493065490 ± 0.000000012 d | |
Inclination | 0.06546 ± 0.040° (to Uranus' equator) |
Satellite of | Uranus |
Physical characteristics | |
Dimensions | 150 × 74 × 74 km[4][note 1] |
~30,000 km2[a] | |
Volume | 430100±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] | |
Albedo | 0.08 ± 0.01[6] |
Temperature | ~64 K[a] |
|
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]