| Discoverer | Stephen P. Synnott / Voyager 2 |
|---|---|
| Discovered | January 3, 1986 |
| Mpc name | Uranus XI |
| Pronounced | /ˈdʒuːliɛt/[1] |
| Adjective | Julietian[2][3] |
| Semimajor | 64,358.222 ± 0.048 km |
| Eccentricity | 0.00066 ± 0.000087 |
| Period | 0.493065490 ± 0.000000012 d |
| Inclination | 0.06546 ± 0.040° (to Uranus's equator) |
| Satellite of | Uranus |
| Dimensions | 150 × 74 × 74 km[4][note 1] |
| Surface area | ~30,000 km2[a] |
| Volume | 430100 km3 ± 23.0%[5] |
| Mass | 3.871 ± 0.891×1017 kg[5] |
| Density | 0.5 g/cm3[6] 0.9 g/cm3 (assumed)[5] |
| Rotation | synchronous[4] |
| Axial tilt | zero[4] |
| Albedo | 0.08 ± 0.01[7] |
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.[8] It is named after the heroine of William Shakespeare's play Romeo and Juliet. It is also designated Uranus XI.[9]
Juliet belongs to the Portia group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Rosalind, Cupid, Belinda, and Perdita.[7] These satellites have similar orbits and photometric properties.[7] Other than its orbit,[10] size of 150 × 74 km mi,[4] and geometric albedo of 0.08,[7] 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 ± 0.3, which is a rather extreme value.[4] Its surface is grey in color.[4]
Juliet may collide with Desdemona within the next 100 million years.[11]
See also
Notes
- ^ Calculated on the basis of other parameters.
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.
- ^ John Robert Reed (1985) Decadent style, p.38.
- ^ 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
- ^ 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. arXiv:2401.04634. Bibcode:2024Icar..41115957F. doi:10.1016/j.icarus.2024.115957. ISSN 0019-1035
- ^ French, Robert S. & Showalter, Mark R. (August 2012). "Cupid is Doomed: An Analysis of the Stability of the Inner Uranian Satellites". Icarus. 220 (2): 911–921. arXiv:1408.2543. Bibcode:2012Icar..220..911F. doi:10.1016/j.icarus.2012.06.031
- ^ 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.
- ^ 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
- ^ 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)
- ^ Only two dimensions are known; the third dimension has been assumed to equal the smaller known dimension.