Tarvos (moon)
{{Short description|Moon of Saturn}}
{{Infobox planet
| discovery_ref = {{Cite web |title=Planetary Satellite Discovery Circumstances |url=https://ssd.jpl.nasa.gov/sats/discovery.html |website=ssd.jpl.nasa.gov}}
| name = Tarvos
| image = Tarvos discovery.gif
| image_scale =
| caption = Animation of discovery images taken by the CFHT in September 2000
| discoverer = B. J. Gladman et al.{{Cite web |date=December 19, 2000 |title=MPEC 2000-Y14 : S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10 |url=https://minorplanetcenter.net//mpec/K00/K00Y14.html |website=minorplanetcenter.net}}
| discovered = September 23, 2000
| mpc_name = Saturn XXI
| alt_names = S/2000 S 4
| pronounced = {{IPAc-en|ˈ|t|ɑːr|v|ɒ|s}}
| adjective = TarvianPer the diminutive Tarvillus in {{Cite book |last=Davis |first=Daniel |title=The Development of Celtic Linguistics, 1850-1900 |date=2001 |page=162}}
| named_after = Tarvos Trigaranus
| epoch = 2000 January 1.5
| semimajor = 18.215 Gm
| eccentricity = 0.528
| inclination = 38.6°
| period = 926.4 d
(2.54 yr)
| satellite_of = Saturn
| group = Gallic group
| mean_diameter = {{val|15|50|30|+errend=%|-errend=%|u=km}}
| spectral_type = light red
B−V=0.77, R−V=0.57
| magnitude = 22.1{{cite book |last1=Denk |first1=Tilmann |url= |title=Enceladus and the Icy Moons of Saturn |last2=Mottola |first2=Stefano |last3=Tosi |first3=Frederico |last4=Bottke |first4=William F. |last5=Hamilton |first5=Douglas P. |publisher=The University of Arizona Press |year=2018 |isbn=9780816537075 |editor1=Schenk, P.M. |series=Space Science Series |volume=322 |location=Tucson, AZ |pages=409–434 |chapter=The Irregular Satellites of Saturn |bibcode=2018eims.book..409D |doi=10.2458/azu_uapress_9780816537075-ch020 |editor2=Clark, R.N. |editor3=Howett, C.J.A. |editor4=Verbiscer, A.J. |editor5=Waite, J.H. |chapter-url=https://tilmanndenk.de/wp-content/uploads/DenkEtAl2018_IrregularMoons.pdf}}
}}
Tarvos {{IPAc-en|ˈ|t|ɑːr|v|ɒ|s}}, or Saturn XXI, is a prograde irregular satellite of Saturn. It was discovered by John J. Kavelaars et al. on September 23, 2000, and given the temporary designation S/2000 S 4. The name, given in August 2003, is after Tarvos, a deity depicted as a bull god carrying three cranes alongside its back from Gaulish mythology.{{Cite web |date=August 8, 2003 |title=IAUC 8177: Sats OF (22); Sats OF JUPITER, SATURN, URANUS |url=http://www.cbat.eps.harvard.edu/iauc/08100/08177.html |website=www.cbat.eps.harvard.edu}}
Orbit
File:Tarvos-discovery-full.gif]]
Tarvos orbits Saturn at an average distance of 18 million km in 926 days and is about 15 km in diameter (assuming an albedo of 0.06).{{cite conference |last1=Denk |first1=T. |last2=Mottola |first2=S. |year=2019 |title=Cassini Observations of Saturn's Irregular Moons |url=https://www.hou.usra.edu/meetings/lpsc2019/pdf/2654.pdf |conference=50th Lunar and Planetary Science Conference |publisher=Lunar and Planetary Institute |number=2132}} It has a high orbital eccentricity of 0.53.SAT452 from {{cite web |author=Jacobson |first=R. A. |date=2007-06-28 |title=Planetary Satellite Mean Orbital Parameters |url=http://ssd.jpl.nasa.gov/?sat_elem#saturn |access-date=2008-01-19 |publisher=JPL/NASA}}
It is a member of the Gallic group of irregular satellites.
Origin
With a similar orbit and displaying a similar light-red colour to Albiorix, Tarvos is thought to have its origin in the break-up of a common progenitor{{Cite journal |last1=Grav |first1=Tommy |author-link=Tommy Grav |last2=Holman |first2=Matthew J. |author-link2=Matthew J. Holman |last3=Gladman |first3=Brett |author-link3=Brett J. Gladman |last4=Aksnes |first4=Kaare |author-link4=Kaare Aksnes |date=November 2003 |title=Photometric Survey of the Irregular Satellites |journal=Icarus |volume=166 |issue=1 |pages=33–45 |doi=10.1016/j.icarus.2003.07.005 |arxiv=astro-ph/0301016 |bibcode=2003Icar..166...33G }}{{Cite journal |last1=Gladman |first1=Brett |author-link=Brett Gladman |last2=Kavelaars |first2=J. J. |author-link2=John J. Kavelaars |last3=Holman |first3=Matthew |author-link3=Matthew J. Holman |last4=Nicholson |first4=Philip D. |author-link4=Phil Nicholson |last5=Burns |first5=Joseph A. |author-link5=Joseph A. Burns |last6=Hergenrother |first6=Carl W. |author-link6=Carl W. Hergenrother |last7=Petit |first7=Jean-Marc |author-link7=Jean-Marc Petit |last8=Marsden |first8=Brian G. |author-link8=Brian G. Marsden |last9=Jacobson |first9=Robert |last10=Gray |first10=William |last11=Grav |first11=Tommy |author-link11=Tommy Grav |date=2001-07-12 |title=Discovery of 12 satellites of Saturn exhibiting orbital clustering |url=https://www.nature.com/articles/35084032 |journal=Nature |language=en |volume=412 |issue=6843 |pages=163–166 |doi=10.1038/35084032 |pmid=11449267 |issn=1476-4687}} or to be a fragment of that body.{{Cite journal |last1=Grav |first1=T. |author-link=Tommy Grav |last2=Bauer |first2=J. |author-link2=James Bauer (astronomer) |date=2007-03-08 |orig-date=2006-11-18 |title=A deeper look at the colors of the Saturnian irregular satellites |journal=Icarus |volume=191 |issue=1 |pages=267–285 |doi=10.1016/j.icarus.2007.04.020 |arxiv=astro-ph/0611590 |bibcode=2007Icar..191..267G }}
References
{{reflist}}
External links
{{Spoken Wikipedia|date=2024-09-13|En-Tarvos-(moon)-article.ogg}}
- Ephemeris [http://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html IAU-MPC NSES]
- [http://www.dtm.ciw.edu/users/sheppard/satellites/satsatdata.html Saturn's Known Satellites] (by Scott S. Sheppard)
{{Moons of Saturn|state=uncollapsed}}
{{Saturn}}
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