Prospero (moon)

Short description: Moon of Uranus

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/[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 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).

## See also

* Uranus' natural satellites
* Irregular satellites

## References

1. ↑ Benjamin Smith (1903), The Century Dictionary and Cyclopedia
2. ↑ Emenyonu, Ernest (2003), Emerging perspectives on Chinua Achebe, v. 1.
3. ↑ in scare quotes in Bate (1997) The genius of Shakespeare
4. ↑ 4.0 4.1 4.2 Sheppard, Jewitt & Kleyna 2005, p. 523, Table 3.
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.
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.
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
8. ↑ 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

* v
* t
* e

Uranus (Outline of Uranus

Geography|

* Atmosphere
* Climate
* Dark Spot
* Magnetosphere
* Rings

NASA image of Uranus

Moons|

* Ariel
* Miranda
* Oberon
* Puck
* Titania
* Umbriel

Astronomy|

| Discovery|

* William Herschel
* Gerard Kuiper
* James L. Elliot
* William Lassell

|

General|

* 15 Orionis
* Uranus-crossing minor planets

Trojans|

* 2011 QF99
* 2014 YX49

Exploration|

| Past|

* Voyager 2 (1986 flyby)

|

Proposals|

* MUSE
* Oceanus
* ODINUS
* NASA Uranus orbiter and probe
* Uranus Pathfinder

Related|

* Fiction

* Category

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Moons of Uranus

* Generally listed in increasing distance from Uranus

Inner|

* Rings of Uranus
* Cordelia
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* Bianca
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* 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
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Natural satellites of the Solar System

Planetary
satellites|

* Terrestrial
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Dwarf-planet
satellites|

* Plutonian
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Minor-planet moons|

* Main belt binaries:
* Antiope
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* Doppler
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* Hektor–Skamandrios
* Iphthime
* Eurydamas
* TNOs:
* Huya
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* Lempo–Paha–Hiisi
* 2002 UX25
* Logos–Zoe
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* Borasisi–Pabu
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* Teharonhiawako–Sawiskera
* Salacia–Actaea
* 2002 WC19
* Altjira
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* 2003 AZ84
* Gǃkúnǁʼhòmdímà–Gǃòʼé ǃHú
* Mors–Somnus
* Manwë–Thorondor
* ǂKá̦gára–ǃHãunu
* 2013 FY27

Ranked by size|

* Planetary-mass moon
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* largest: 5268 km / 0.413 Earths
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