Cupid (moon)

Cupid
Discovery
Discovered by	Mark R. Showalter and Jack J. Lissauer
Discovery date	August 25, 2003
Designations
Designation	Uranus XXVII
Pronunciation	/ˈkjuːpəd/
Adjectives	Cupidian /kjuːˈpɪdiən/
Orbital characteristics
Semi-major axis	74,392 km
Eccentricity	0.0013
Orbital period	0.618 d
Inclination	0.1° (to Uranus' equator)
Satellite of	Uranus
Physical characteristics
Mean radius	~9 km
Surface area	~1,000 km2
Volume	~3,000 km3
Mass	~3.8×1015 kg
Mean density	~1.3 g/cm3
surface gravity	~0.0031 m/s2
escape velocity	~0.0076 km/s
Rotation period	synchronous
Axial tilt	0
Albedo	0.07 (assumed)
Physics	~64 K

Short description: Moon of Uranus

Cupid is an inner satellite of Uranus. It was discovered by Mark R. Showalter and Jack J. Lissauer in 2003 using the Hubble Space Telescope.^[3] It was named after a character in William Shakespeare's play Timon of Athens.^[4]

It is the smallest known inner Uranian satellite, crudely estimated to be only about 18 km in diameter. This and the dark surface made it too dim to be detected by the Voyager 2 cameras during its Uranus flyby in 1986.

The orbit of Cupid differs only by 863 km from the orbit of the larger moon Belinda. Unlike Mab and Perdita, Uranian satellites also discovered in 2003, it does not seem to be perturbed.^[2] Despite this, it has the least stable orbit of Uranus's inner moons — it is likely to collide with Belinda in the next 100,000–10 million years, due to resonance interactions that cause the smaller Cupid to drift into a more dangerous orbit over this timescale.^[5]

Following its discovery, Cupid was given the temporary designation S/2003 U 2.^[3] It is also designated Uranus XXVII.^[4]

It should not be confused with the asteroid 763 Cupido.

References

↑ Tanner & Barnet (1995) Comedies
↑ ^2.0 ^2.1 Showalter, Mark R.; Lissauer, Jack J. (2006-02-17). "The Second Ring-Moon System of Uranus: Discovery and Dynamics". Science 311 (5763): 973–977. doi:10.1126/science.1122882. PMID 16373533. Bibcode: 2006Sci...311..973S.
↑ ^3.0 ^3.1 Showalter, Mark R.; Lissauer, Jack J. (September 25, 2003). "S/2003 U 1 and S/2003 U 2". IAU Circular 8209: 1. ISSN 0081-0304. Bibcode: 2003IAUC.8209....1S. http://www.cbat.eps.harvard.edu/iauc/08200/08209.html. Retrieved 2011-11-02.
↑ ^4.0 ^4.1 "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. http://planetarynames.wr.usgs.gov/Page/Planets.
↑ French, Robert S.; Showalter, Mark R. (August 2012). "Cupid is doomed: An analysis of the stability of the inner uranian satellites". Icarus 220 (2): 911–921. doi:10.1016/j.icarus.2012.06.031. Bibcode: 2012Icar..220..911F.

External links

Hubble Uncovers Smallest Moons Yet Seen Around Uranus – Hubble Space Telescope news release (25 September 2003)

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[1] Tanner & Barnet (1995) Comedies

[Showalter_Lissauer_2006-2] 2.0 ^2.1 Showalter, Mark R.; Lissauer, Jack J. (2006-02-17). "The Second Ring-Moon System of Uranus: Discovery and Dynamics". Science 311 (5763): 973–977. doi:10.1126/science.1122882. PMID 16373533. Bibcode: 2006Sci...311..973S.

[IAUC_8209-3] 3.0 ^3.1 Showalter, Mark R.; Lissauer, Jack J. (September 25, 2003). "S/2003 U 1 and S/2003 U 2". IAU Circular 8209: 1. ISSN 0081-0304. Bibcode: 2003IAUC.8209....1S. http://www.cbat.eps.harvard.edu/iauc/08200/08209.html. Retrieved 2011-11-02.

[Gazetteer-4] 4.0 ^4.1 "Planet and Satellite Names and Discoverers". Gazetteer of Planetary Nomenclature. USGS Astrogeology. July 21, 2006. http://planetarynames.wr.usgs.gov/Page/Planets.

[French_Showalter_2012-5] French, Robert S.; Showalter, Mark R. (August 2012). "Cupid is doomed: An analysis of the stability of the inner uranian satellites". Icarus 220 (2): 911–921. doi:10.1016/j.icarus.2012.06.031. Bibcode: 2012Icar..220..911F.

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v t e Moons of Uranus
Generally listed in increasing distance from Uranus
Inner	Rings of Uranus Cordelia Ophelia Bianca Cressida Desdemona Juliet Portia Rosalind Cupid Belinda Perdita Puck Mab
Major (spheroid)	Miranda Ariel Umbriel Titania Oberon
Outer (irregular)	Francisco Caliban Stephano Trinculo Sycorax Margaret Prospero Setebos Ferdinand
Geological features	Arielian Kachina Chasmata Yangoor Mirandian Verona Rupes Oberonian Hamlet Mommur Chasma Puckian Titanian Gertrude Messina Chasmata Ursula Rousillon Rupes Umbrielian Wunda Vuver Skynd

v t e Natural satellites of the Solar System
Planetary satellites	Terrestrial Martian Jovian Saturnian Uranian Neptunian
Dwarf-planet satellites	Plutonian Haumean Makemakean Eridian OR₁₀ Quaoaran Orcean
Minor-planet moons	Main belt binaries: Antiope Frostia Berna Tokai Ostro Balam Doppler Pauling Iwamoto Wolff Bettig Christophedumas Trojans: Patroclus–Menoetius Hektor–Skamandrios Iphthime Eurydamas TNOs: Huya Typhon–Echidna Lempo–Paha–Hiisi 2002 UX₂₅ Logos–Zoe Ceto–Phorcys Borasisi–Pabu Sila–Nunam Teharonhiawako–Sawiskera Salacia–Actaea 2002 WC₁₉ Altjira Varda–Ilmarë 2003 AZ₈₄ Gǃkúnǁʼhòmdímà–Gǃòʼé ǃHú Mors–Somnus Manwë–Thorondor ǂKá̦gára–ǃHãunu 2013 FY27
Ranked by size	Planetary-mass moon Ganymede largest: 5268 km / 0.413 Earths Titan Callisto Io Moon Europa Triton Titania Rhea Oberon Iapetus Charon Umbriel Ariel Dione Tethys Dysnomia Enceladus Miranda Vanth Proteus Mimas Ilmarë Nereid Hiʻiaka Actaea Hyperion ...
Discovery timeline Inner moons Irregular moons List Planetary-mass moons Naming Subsatellite Regular moons Trojan moons

Cupid (moon)

Topic: Astronomy

References

External links