Belinda (moon)
From Wikipedia, the free encyclopedia
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Discovery
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| Discovered by | Stephen P. Synnott / Voyager 2 |
| Discovery date | January 13, 1986 |
| Mean orbit radius | 75,255.613 ± 0.057 km[1] |
| Eccentricity | 0.00007 ± 0.000073[1] |
| Orbital period | 0.623527470 ± 0.000000017 d[1] |
| Inclination | 0.03063 ± 0.028° (to Uranus' equator)[1] |
| Satellite of | Uranus |
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Physical characteristics
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| Dimensions | 128 × 64 × 64 km[2] |
| Mean radius | 45 ± 8 km[2] |
| Surface area | ~25,000 km²[3] |
| Volume | ~380,000 km³[3] |
| Mass | ~4.9×1017 kg[3] |
| Mean density | ~1.3 g/cm³ assumed |
| Equatorial surface gravity | ~0.014 m/s2[3] |
| Escape velocity | ~0.034 km/s[3] |
| Rotation period | synchronous[2] |
| Axial tilt | zero[2] |
| Albedo | 0.08 ± 0.01[4] |
| Temperature | ~64 K[3] |
Belinda (bə-lin'-də, IPA: /bɨˈlɪndə/) is an inner satellite of the planet Uranus. Belinda was discovered from the images taken by Voyager 2 on 1986-01-13 and was given the temporary designation S/1986 U 5.[5] It is named after the heroine of Alexander Pope's The Rape of the Lock. It is also designated Uranus XIV.[6]
Belinda belongs to the Portia Group of satellites, which also includes Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Rosalind and Perdita.[4] These satellites have similar orbits and photometric properties.[4] Other than its orbit,[1] radius of 45 km[2] and geometric albedo of 0.08[4] virtually nothing is known about it.
The Voyager 2 images show Belinda as an elongated object with its major axis pointing towards Uranus. The moon is very elongated, with its short axis 0.5 ± 0.1 times the long axis.[2] Its surface is grey in color.[2]
[edit] References
- ^ a b c d e Jacobson, R.A. (1998). "The Orbits of the Inner Uranian Satellites From Hubble Space Telescope and Voyager2 Observations". The Astronomical Journal 115: 1195-1199. doi:.
- ^ a b c d e f g Karkoschka, Erich (2001). "Voyager's Eleventh Discovery of a Satellite of Uranus and Photometry and the First Size Measurements of Nine Satellites". Icarus 151: 69–77. doi:.
- ^ a b c d e f Calculated on the basis of other parameters
- ^ a b c d Karkoschka, Erich (2001). "Comprehensive Photometry of the Rings and 16 Satellites of Uranus with the Hubble Space Telescope". Icarus 151: 51–68. doi:.
- ^ Smith, B. A. (January 16 1986). IAU Circular No. 4164. Retrieved on 2006-08-06.
- ^ Planet and Satellite Names and Discoverers. Gazetteer of Planetary Nomenclature. USGS Astrogeology (July 21 2006). Retrieved on 2006-08-06.
[edit] External links
Belinda Profile by NASA's Solar System Exploration
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