- There is also an asteroid called 1285 Julietta.
 | |
| 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 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]
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]
See also
Notes
References
- ^ Benjamin Smith (1903). The Century Dictionary and Cyclopedia.
- ^ W. M. Anderson (1892). "Daniel Johnson Brimm". Shield and Diamond. Vol. 2, no. 1. p. 116.
- ^ a b Jacobson, R. A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager 2 Observations". The Astronomical Journal. 115 (3): 1195–1199. Bibcode:1998AJ....115.1195J. doi:10.1086/300263.
- ^ a b c d e f 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.
- ^ a b c French, Richard G.; Hedman, Matthew M.; Nicholson, Philip D.; Longaretti, Pierre-Yves; McGhee-French, Colleen A. (2024-03-15). "The Uranus system from occultation observations (1977–2006): Rings, pole direction, gravity field, and masses of Cressida, Cordelia, and Ophelia". Icarus. 411: 115957. arXiv:2401.04634. doi:10.1016/j.icarus.2024.115957. ISSN 0019-1035.
- ^ a b c d 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.
- ^ Smith, B. A. (January 16, 1986). "Satellites of Uranus". IAU Circular. 4164. Retrieved 29 October 2011.
- ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. Retrieved 6 August 2006.
- ^ Duncan, Martin J.; Lissauer, Jack J. (1997). "Orbital Stability of the Uranian Satellite System". Icarus. 125 (1): 1–12. Bibcode:1997Icar..125....1D. doi:10.1006/icar.1996.5568.
External links
- Juliet Profile by NASA's Solar System Exploration
- Juliet + Ring diagram (Courtesy of Astronomy Magazine 2005)
- Uranus' Known Satellites (by Scott S. Sheppard)
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This page was last edited on 16 March 2024, at 04:29