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Setebos (moon)

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Moon of Uranus

Setebos
Discovery
Discovery image of Setebos (encircled)
Discovered by	John J. Kavelaars Brett J. Gladman Matthew J. Holman Jean-Marc Petit Hans Scholl
Discovery date	July 18, 1999
Designations
Designation	Uranus XIX
Pronunciation	/ˈsɛtɛbʌs/,^[1]/-bɒs/^[2]
Adjectives	Setebosian/ˌsɛtɛˈboʊsiən/^[3]
Orbital characteristics
Mean orbitradius	17,418,000 km^[4]^[5]
Eccentricity	0.5914^[5]
Orbital period (sidereal)	2225.21 d
Inclination	158° (to theecliptic)^[4]
Satellite of	Uranus
Physical characteristics
Mean radius	24 km (estimate)^[6] <50 km^[7]
Surface area	~7200 km² (estimate)
Volume	~58,000 km³ (estimate)
Mass	~7.5×10¹⁶kg (estimate)
Meandensity	~1.3 g/cm³ (assumed)
Surface gravity	~0.0063m/s² (estimate)
Escape velocity	~0.0204 km/s (estimate)
Synodic rotation period	4.255 ± 0.017 h^[7]
Axial tilt	?
Albedo	0.04 (assumed)^[6]
Temperature	~65K (estimate)

Setebos/ˈsɛtɛbʌs/ is one of the outermostretrograde irregular satellites ofUranus. It was discovered on 18 July 1999 byJohn J. Kavelaarset al. and provisionally designatedS/1999 U 1.^[8]

Animation of discovery images taken in July 1999

Confirmed asUranus XIX, it is named after the godSetebos worshipped byCaliban andSycorax inWilliam Shakespeare's playThe Tempest.

The orbital parameters suggest that it may belong to the same dynamic cluster asSycorax andProspero, suggesting common origin.^[9] However, this suggestion does not appear to be supported by the observed colours. The satellite appears neutral (grey) invisible light (colour indicesB−V = 0.77 ,R−V = 0.35 ),^[10] similar to Prospero but different from Sycorax (which is light red).

A crater onUmbriel is also named after Setebos, but with the spellingSetibos.

References

[edit]

^Shakespeare Recording Society (1995)The Tempest (audio CD)
^Benjamin Smith (1903)The Century Dictionary and Cyclopedia
^Campbell, Pyre, Weaver (1932)Poetry and criticism of the romantic movement
^^a ^bSheppard, Jewitt & Kleyna 2005, p. 523, Table 3.
^^a ^bYeomans, Donald K. (2007-06-28)."Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved2008-01-19.
^^a ^bSheppard, Jewitt & Kleyna 2005, p. 523, Table 3 ... rⁱ (km) ... 24 ...ⁱ Radius of satellite assuming a geometric albedo of 0.04.
^^a ^bFarkas-Takács, A.; Kiss, Cs.; Pál, A.; Molnár, L.; Szabó, Gy. M.; Hanyecz, O.; et al. (September 2017)."Properties of the Irregular Satellite System around Uranus Inferred from K2, Herschel, and Spitzer Observations".The Astronomical Journal.154 (3): 13.arXiv:1706.06837.Bibcode:2017AJ....154..119F.doi:10.3847/1538-3881/aa8365.S2CID 118869078. 119.
^Gladman, B. J.;Kavelaars, J. J.;Holman, M. J.,Petit, J.-M.;Scholl, H.;Nicholson, P. D.; and Burns, J. A.;The Discovery of Uranus XIX, XX, and XXI, Icarus,147 (2000), pages 320–324
^Grav, Tommy; Holman, Matthew J.; Gladman, Brett J.; andAksnes, Kaare;Photometric survey of the irregular satellites, Icarus,166, (2003), pages 33–45.arXiv:astro-ph/0301016
^Grav, Holman & Fraser 2004.

Grav, Tommy;Holman, Matthew J.; Fraser, Wesley C. (2004-09-20). "Photometry of Irregular Satellites of Uranus and Neptune".The Astrophysical Journal.613 (1):L77 –L80.arXiv:astro-ph/0405605.Bibcode:2004ApJ...613L..77G.doi:10.1086/424997.S2CID 15706906.
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.arXiv:astro-ph/0410059.Bibcode:2005AJ....129..518S.doi:10.1086/426329.S2CID 18688556.

External links

[edit]

"Setebos" (profile). Archived fromthe original on 2007-06-09. via"Solar System Exploration". NASA.
Jewitt, D.C. (c. 2008)."Hawaii Irregular Satellites Survey". Uranus' moons.David Jewitt pages.University of Hawaiʻi. Archived fromthe original on 2008-12-26. Retrieved2023-08-03.
Sheppard, S.S."Uranus' known satellites".
"Natural satellites". Ephemeris service.Minor Planet Center (MPC).Harvard–Smithsonian Center for Astrophysics (CfA).

Moons of Uranus

Listed in approximately increasing distance fromUranus

Inner

Major (spheroid)

Miranda
Ariel
Umbriel
Titania
Oberon

Outer (irregular)

Caliban group (3)	Caliban Stephano S/2023 U 1
Margaret (1)	Margaret
Other retrograde moons (6)	Francisco Trinculo Sycorax Prospero Setebos Ferdinand

Geological features

Uranus

Outline

Geography

Major moons

Astronomy

Discovery	William Herschel Gerard Kuiper James L. Elliot William Lassell
General	Uranus-crossing minor planets
Co-orbitals	Trojans 2011 QF₉₉ 2014 YX₄₉ 83982 Crantor (472651)2015 DB₂₁₆

Exploration

Past	Voyager 2 (1986 flyby)
Future	Tianwen-4 (2029, flyby 2045)
Proposals	MUSE OCEANUS ODINUS Uranus Orbiter and Probe Uranus Pathfinder

Fiction

Category

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