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Discovery
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| Discovered by | Matthew J. Holman John J. Kavelaars Dan Milisavljevic Brett J. Gladman |
| Discovery date | August 13, 2001[1][2] (confirmed in 2003[1][3]) |
| Mean orbit radius | 4,276,000 km[4][5] |
| Eccentricity | 0.1459[5] |
| Orbital period | 266.56 d |
| Inclination | 145° (to the ecliptic)[6] |
| Satellite of | Uranus |
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Physical characteristics
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| Mean radius | 11 km (estimate)[6] |
| Surface area | ~1,500 km2 (estimate) |
| Volume | ~6,000 km3 (estimate) |
| Mass | ~7.2 × 1015 kg (estimate) |
| Mean density | ~1.3 g/cm3 (assumed) |
| Equatorial surface gravity | ~0.0025 m/s2 (estimate) |
| Escape velocity | ~0.0094 km/s (estimate) |
| Rotation period | ? |
| Axial tilt | ? |
| Albedo | 0.04 (assumed)[6] |
| Temperature | ~65 K (estimate) |
Francisco (pronounced /frænˈsɪskoʊ/ fran-SIS-koh) is the innermost irregular satellite of Uranus.
Francisco was discovered by Matthew J. Holman, et al. and Brett J. Gladman, et al. in 2003 from pictures taken in 2001 and given the provisional designation S/2001 U 3. Confirmed as Uranus XXII, it was named after a lord in William Shakespeare's play The Tempest.[7]
See also
References
- ^ a b Daniel W. E. Green (2003-10-07). "IAUC 8216: S/2001 U 3". IAU Circular. http://www.cfa.harvard.edu/iauc/08200/08216.html. Retrieved 2008-12-19.
- ^ Jennifer Blue (2008-10-16). "Planet and Satellite Names and Discoverers". Working Group for Planetary System Nomenclature (WGPSN). http://planetarynames.wr.usgs.gov/append7.html#UranianSystem. Retrieved 2008-12-19.
- ^ Scott S. Sheppard. "New Satellites of Uranus Discovered in 2003". Institute for Astronomy at the University of Hawaii. http://www.ifa.hawaii.edu/~sheppard/satellites/uranus2003.html. Retrieved 2008-12-19.
- ^ Sheppard 2005, p. 523
- ^ a b Jacobson, R.A. (2003) URA067 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. http://ssd.jpl.nasa.gov/?sat_elem#uranus. Retrieved 2008-01-23.
- ^ a b c Sheppard, Scott S.; David C. Jewitt, Jan Kleyna (2005). "An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness". The Astronomical Journal 129 (1): 518–525. http://arxiv.org/abs/astro-ph/0410059. Retrieved 20 October 2009. "Table 3 ... ri (km) ... 11 ... i Radius of satellite assuming a geometric albedo of 0.04.".
- ^ "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21 2006. http://planetarynames.wr.usgs.gov/append7.html. Retrieved 2006-08-06.
External links
- Francisco profile by NASA's Solar System Exploration
- David Jewitt pages
- Uranus' Known Satellites (by Scott S. Sheppard)
- Ephemeris IAU-NSES
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