Cupid (moon)
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| Discovery | |||||||
|---|---|---|---|---|---|---|---|
| Discovered by | Mark R. Showalter and Jack J. Lissauer | ||||||
| Discovered in | August 25, 2003 | ||||||
| Orbital characteristics | |||||||
| Semi-major axis | 74,392 km | ||||||
| Eccentricity | 0.0013 | ||||||
| Orbital period | 0.618 d | ||||||
| Inclination | 0.1° (to Uranus' equator) | ||||||
| Is a satellite of | Uranus | ||||||
| Physical characteristics | |||||||
| Mean diameter | 17.8 km | ||||||
| Surface area | ~1,000 km2 | ||||||
| Volume | ~3,000 km3 | ||||||
| Mass | ~3.8Template:E kg | ||||||
| Mean density | ~1.3 g/cm3 | ||||||
| Surface gravity | ~0.0031 m/s2 | ||||||
| Escape velocity | ~0.0076 km/s | ||||||
| Rotation period | synchronous | ||||||
| Axial tilt | zero | ||||||
| Albedo | 0.07 (assumed) | ||||||
| Surface temp. |
| ||||||
| Atmospheric pressure | 0 kPa | ||||||
Cupid (kew'-pid, IPA Template:IPA) is a natural satellite of Uranus. It was discovered by Mark Showalter, et al. in 2003 using the Hubble Space Telescope. It was named after a character in William Shakespeare's play Timon of Athens. It should not be confused with the asteroid 763 Cupido.
It was too dark and small for the Voyager 2 probe to detect it during its Uranus flyby.
Because Cupid's orbit differs from Belinda's in orbital radius by only 500 kilometers, this satellite's orbit may be unstable [1].
Following its discovery, Cupid was given the temporary designation of S/2003 U 2. It is also designated Uranus XXVII.
External links
- Hubble Uncovers Smallest Moons Yet Seen Around Uranus – Hubble Space Telescope news release (2003-09-25)
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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 2 de:Cupid (Mond) fr:Cupidon (lune) hr:Kupid (mjesec) pl:S/2003 U 2 sk:Cupid (mesiac) sv:Cupid (måne) zh:天卫二十七