Francisco (moon)
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| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Matthew J. Holman, John J. Kavelaars, Dan Milisavljevic, and Brett J. Gladman |
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| Discovered in | August 13, 2003 | ||||||
| Orbital characteristics | |||||||
| Semi-major axis | 4,276,000 km | ||||||
| Eccentricity | 0.1459[1] | ||||||
| Orbital period | 266.56 d | ||||||
| Inclination | 145° (to the ecliptic)[2] | ||||||
| Is a satellite of | Uranus | ||||||
| Physical characteristics | |||||||
| Mean diameter | ~22 km (estimate)[2] | ||||||
| Surface area | ~1500 km² (estimate) | ||||||
| Volume | ~6000 km³ (estimate) | ||||||
| Mass | 7.2×1015 kg (estimate) | ||||||
| Mean density | ~1.3 g/cm³ (assumed) | ||||||
| Surface gravity | ~0.0025 m/s2 (estimate) | ||||||
| Escape velocity | ~0.0094 km/s (estimate) | ||||||
| Rotation period | ? | ||||||
| Axial tilt | ?° | ||||||
| Albedo | 0.04 (assumed)[2] | ||||||
| Surface temp. |
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| Atmospheric pressure | 0 kPa | ||||||
Francisco (fran-sis'-koe, IPA: /frænˈsɪskɔʊ/) 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.[3]
[edit] See also
[edit] References
- ^ Jacobson, R.A. (2003) URA068 (2007-Jun-28). Planetary Satellite Mean Orbital Parameters. JPL/NASA. Retrieved on 2008-01-23.
- ^ a b c Scott S. Sheppard, David C. Jewitt, and Jan Kleyna An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness, The Astronomical Journal, 129 (2005), pages 518–525 . Preprint
- ^ Planet and Satellite Names and Discoverers. Gazetteer of Planetary Nomenclature. USGS Astrogeology (July 21 2006). Retrieved on 2006-08-06.
[edit] 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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