Prospero (Moon)

Prospero
	Discovery image of Prospero, taken by the CFHT in July 1999
Discovery
Discovered by	John J. Kavelaars; Brett J. Gladman; Matthew J. Holman; Jean-Marc Petit; Hans Scholl;
Discovery date	18 July 1999
Designations
Designation	Uranus XVIII
Pronunciation	/ˈprɒspɛroʊ/
Adjectives	Prosperonian /prɒspɛˈroʊniən/, Prosperian /prɒˈspɪəriən/
Orbital characteristics
Mean orbit radius	16,256,000 km
Eccentricity	0.4448
Orbital period	1978.29 d
Inclination	152° (to the ecliptic)
Satellite of	Uranus
Physical characteristics
Mean radius	25 km (estimate)
Surface area	~8000 km2 (estimate)
Volume	~65,000 km3 (estimate)
Mass	~8.5×1016 kg (estimate)
Mean density	~1.3 g/cm3 (assumed)
surface gravity	~0.0063 m/s2 (estimate)
escape velocity	~0.021 km/s (estimate)
Rotation period	7.145 ± 0.092 h
Axial tilt	?
Albedo	0.04 (assumed)
Physics	~65 K (estimate)

Short description: Moon of Uranus

Prospero is a relatively small retrograde irregular satellite of Uranus discovered on 18 July 1999 by the astrophysicist Matthew Holman and his team, and given the provisional designation S/1999 U 3. Confirmed as Uranus XVIII it was named after the sorcerer Prospero in William Shakespeare's play The Tempest.

Animation of discovery images to show Prospero's motion among background stars

The orbital parameters suggest that it may belong to the same dynamic cluster as Sycorax and Setebos, suggesting common origin.^[7] However, this suggestion does not appear to be supported by the observed colours. The satellite appears neutral (grey) in visible light (colour indices B-V=0.80, R-V=0.39),^[8] similar to Setebos but different from Sycorax (which is light red).

References

↑ Benjamin Smith (1903), The Century Dictionary and Cyclopedia
↑ Emenyonu, Ernest (2003), Emerging perspectives on Chinua Achebe, v. 1.
↑ in scare quotes in Bate (1997) The genius of Shakespeare
↑ ^4.0 ^4.1 ^4.2 Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3.
↑ ^5.0 ^5.1 Yeomans, Donald K. (28 June 2007). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. http://ssd.jpl.nasa.gov/?sat_elem#uranus. Retrieved 19 January 2008.
↑ ^6.0 ^6.1 Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3 ... rⁱ (km) ... 25 ... ⁱ Radius of satellite assuming a geometric albedo of 0.04.
↑ Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites, Icarus, 166, (2003), pp. 33–45. arXiv:astro-ph/0301016
↑ Grav, Holman & Fraser 2004.

Grav, Tommy; Holman, Matthew J.; Fraser, Wesley C. (20 September 2004). "Photometry of Irregular Satellites of Uranus and Neptune". The Astrophysical Journal 613 (1): L77–L80. doi:10.1086/424997. Bibcode: 2004ApJ...613L..77G.
Sheppard, S. S.; Jewitt, D.; Kleyna, J. (2005). "An Ultradeep Survey for Irregular Satellites of Uranus: Limits to Completeness". The Astronomical Journal 129 (1): 518–525. doi:10.1086/426329. Bibcode: 2005AJ....129..518S.

External links

Prospero Profile by NASA's Solar System Exploration
David Jewitt pages
Uranus' Known Satellites (by Scott S. Sheppard)
MPC: Natural Satellites Ephemeris Service

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[1] Benjamin Smith (1903), The Century Dictionary and Cyclopedia

[2] Emenyonu, Ernest (2003), Emerging perspectives on Chinua Achebe, v. 1.

[3] scare quotes in Bate (1997) The genius of Shakespeare

[FOOTNOTESheppardJewittKleyna2005523Table_3-4] 4.0 ^4.1 ^4.2 Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3.

[JPL-5] 5.0 ^5.1 Yeomans, Donald K. (28 June 2007). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. http://ssd.jpl.nasa.gov/?sat_elem#uranus. Retrieved 19 January 2008.

[Sheppard_et_al._2005_radius/albedo-6] 6.0 ^6.1 Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3 ... rⁱ (km) ... 25 ... ⁱ Radius of satellite assuming a geometric albedo of 0.04.

[Grav_2003-7] Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; Aksnes, Kaare Photometric survey of the irregular satellites, Icarus, 166, (2003), pp. 33–45. arXiv:astro-ph/0301016

[FOOTNOTEGravHolmanFraser2004-8] Grav, Holman & Fraser 2004.

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

Discovery
Discovery image of Prospero, taken by the CFHT in July 1999
Discovered by	John J. Kavelaars Brett J. Gladman Matthew J. Holman Jean-Marc Petit Hans Scholl
Discovery date	18 July 1999
Designations
Designation	Uranus XVIII
Pronunciation	/ˈprɒspɛroʊ/^[1]
Adjectives	Prosperonian /prɒspɛˈroʊniən/,^[2] Prosperian /prɒˈspɪəriən/^[3]
Orbital characteristics
Mean orbit radius	16,256,000 km^[4]^[5]
Eccentricity	0.4448^[5]
Orbital period	1978.29 d
Inclination	152°^[4] (to the ecliptic)^[4]
Satellite of	Uranus
Physical characteristics
Mean radius	25 km (estimate)^[6]
Surface area	~8000 km² (estimate)
Volume	~65,000 km³ (estimate)
Mass	~8.5×10¹⁶ kg (estimate)
Mean density	~1.3 g/cm³ (assumed)
surface gravity	~0.0063 m/s² (estimate)
escape velocity	~0.021 km/s (estimate)
Rotation period	7.145 ± 0.092 h
Axial tilt	?
Albedo	0.04 (assumed)^[6]
Physics	~65 K (estimate)

Prospero (Moon)

See also

References

External links