Mab (moon)
From Free net encyclopedia
| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Mark R. Showalter and Jack J. Lissauer | ||||||
| Discovered in | August 25, 2003 | ||||||
| Orbital characteristics | |||||||
| Semi-major axis | 97,736 km | ||||||
| Eccentricity | 0.0025 | ||||||
| Orbital period | 0.923 d | ||||||
| Inclination | 0.1335° (to Uranus' equator) | ||||||
| Is a satellite of | Uranus | ||||||
| Physical characteristics | |||||||
| Mean diameter | 24.8 km | ||||||
| Surface area | ~1,900 km2 | ||||||
| Volume | ~8,000 km3 | ||||||
| Mass | ~1.0Template:E kg | ||||||
| Mean density | ~1.3 g/cm3 | ||||||
| Surface gravity | ~0.0044 m/s2 | ||||||
| Escape velocity | ~0.011 km/s | ||||||
| Rotation period | synchronous | ||||||
| Axial tilt | zero | ||||||
| Albedo | 0.103 | ||||||
| Surface temp. |
| ||||||
| Atmospheric pressure | 0 kPa | ||||||
Mab (mab', IPA Template:IPA) is a natural satellite of Uranus. It was discovered by Mark R. Showalter, et al. in 2003 using the Hubble Space Telescope. It was named after Queen Mab, a fairy queen from English folklore who is mentioned in William Shakespeare's play Romeo and Juliet.
It was too dark and small for the Voyager 2 probe to detect it during its Uranus flyby.
There are so many moons in the region that its orbit may be unstable.
Mab orbits at the same distance from Uranus as R/2003 U 1, a newly discovered outer ring, and is thought to supply material to the ring [1].
Following its discovery, Mab was given the temporary designation of S/2003 U 1. In addition to Mab, this moon is also designated Uranus XXVI.
External links
- Hubble Uncovers Smallest Moons Yet Seen Around Uranus – Hubble Space Telescope news release (2003-09-25)
- Hubble Discovers Giant Rings and New Moons Encircling Uranus – Hubble Space Telescope news release (2005-12-22)
References
- {{cite journal
| first=Mark R. | last=Showalter | coauthors=Jack J. Lissauer | title=The Second Ring-Moon System of Uranus: Discovery and Dynamics | journal=Science Express | date=2005-12-22 | id=Template:Doi | url=http://www.sciencemag.org/cgi/content/abstract/1122882v1
}}
| Image:Uranus2 symbol.ant.png Uranus (satellites) edit |
|---|
| Cordelia | Ophelia | Bianca | Cressida | Desdemona | Juliet | Portia | Rosalind | Cupid |
| Belinda | Perdita | Puck | Mab | Miranda | Ariel | Umbriel | Titania | Oberon | Francisco |
| Caliban | Stephano | Trinculo | Sycorax | Margaret | Prospero | Setebos | Ferdinand |
| See also: Pronunciation key | Rings of Uranus |
da:S/2003 U 1 de:Mab (Mond) fr:Mab (lune) hr:Mab (mjesec) pl:S/2003 U 1 sk:Mab (mesiac) zh:天卫二十六