Juliet (moon)
Moon of Uranus
From Wikipedia, the free encyclopedia
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.[11] It is named after the heroine of William Shakespeare's play Romeo and Juliet. It is also designated Uranus XI.[12]
| |
| Discovery | |
|---|---|
| Discovered by | Stephen P. Synnott / Voyager 2 |
| Discovery date | January 3, 1986 |
| Designations | |
Designation | Uranus XI |
| Pronunciation | /ˈdʒuːliɛt/[1] |
| Adjectives | Julietian[2][3] |
| Orbital characteristics[4] | |
| 64,358.222 ± 0.048 km | |
| Eccentricity | 0.00066 ± 0.000087 |
| 0.493065490 ± 0.000000012 d | |
| Inclination | 0.06546 ± 0.040° (to Uranus's equator) |
| Satellite of | Uranus |
| Physical characteristics | |
| Dimensions | 150 × 74 × 74 km[a] |
| 47.2±3.9 km[b] | |
| Volume | 430100 km3 ± 23.0%[6] |
| Mass | (3.871±0.891)×1017 kg[6] |
Mean density | 0.5–1.2 g/cm3[7] 0.9 g/cm3 (assumed)[6] |
| synchronous (assumed) | |
| zero (assumed) | |
| Albedo | 0.075 ± 0.011 (geometric)[8] 0.026 ± 0.005 (Bond)[9] |
| 20.96–21.27 (± 0.05) (at opposition)[10] | |
| 8.25–8.56 (± 0.05)[10] | |
Juliet belongs to the Portia group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Rosalind, Cupid, Belinda, and Perdita.[13] These satellites have similar orbits and photometric properties.[13] Other than its orbit,[4] size of 150 km × 74 km (93 mi × 46 mi),[5] and geometric albedo of 0.075,[8] little is known about Juliet.
In Voyager 2 imagery, Juliet appears as an elongated object, with its major axis pointing towards Uranus. The ratio of axes of Juliet's prolate spheroid is 0.5 ± 0.1, which is a rather extreme value.[5] Its surface is grey in color.[14]
Juliet may collide with Desdemona within the next 100 million years.[15]
![{\displaystyle {\sqrt[{3}]{a\cdot b\cdot b}}}](http://wikimedia.org/api/rest_v1/media/math/render/svg/1a29c429c31a36e62ea80908fa59c37714390b86)
