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{{Short description|Moon of Saturn}}
{{Short description|Moon of Saturn}}
{{Infobox planet
{{Infobox planet
|discovery_ref=<ref name="Discoverers_JPL">Discovery Circumstances [http://ssd.jpl.nasa.gov/?sat_discovery from JPL]</ref>
| discovery_ref = <ref name="Discoverers_JPL">Discovery Circumstances [http://ssd.jpl.nasa.gov/?sat_discovery from JPL]</ref>
|name=Skoll
| name = Skoll
|mpc_name=Saturn XLVII
| mpc_name = Saturn XLVII
|alt_names=S/2006 S 8
| alt_names = S/2006 S 8
|pronounced={{IPAc-en|lang|s|k|ɒ|l}}<br/>{{IPA-non|skœlː|lang}} <small>(approximately</small> {{IPAc-en|s|k|ɜːr|l}}<small>)</small>
| pronounced = {{IPAc-en|lang|s|k|ɒ|l}}<br/>{{IPA-non|skœlː|lang}} <small>(approximately</small> {{IPAc-en|s|k|ɜːr|l}}<small>)</small>
|adjective=
| adjective =
|named_after=[[Sköll]]
| named_after = [[Sköll]]
| image = [[File:Skoll-Cassini.png|250x250px]]
|image=
| caption = Image of Skoll taken by ''[[Cassini–Huygens|Cassini]]'' on February 23, 2016
|caption=
|discoverer=[[Scott S. Sheppard|S. S. Sheppard]]<br>[[David C. Jewitt|D. C. Jewitt]]<br>[[Jan Kleyna|J. Kleyna]]
| discoverer = [[Scott S. Sheppard|S. S. Sheppard]]<br>[[David C. Jewitt|D. C. Jewitt]]<br>[[Jan Kleyna|J. Kleyna]]
|discovered=2006
| discovered = 2006
|orbit_ref=<ref name="MPEC">[http://www.minorplanetcenter.org/mpec/K06/K06M45.html MPEC 2006-M45: ''Eight New Satellites of Saturn''] 26 June 2006 (discovery and ephemeris)</ref>
| orbit_ref = <ref name="MPEC">{{cite web|url=http://www.minorplanetcenter.org/mpec/K06/K06M45.html|title=MPEC 2006-M45: ''Eight New Satellites of Saturn''|date= 26 June 2006}}</ref>
|semimajor=17.56 Gm
| semimajor = {{val|17560000|u=km}}
|eccentricity=0.418
| eccentricity = 0.418
|inclination=156°
| inclination = 156°
| group = [[Norse group]]
⚫
|period=869 days <br>(2.38 [[Julian year (astronomy)|yr]])
| satellite_of = [[Saturn]]
⚫
|mean_diameter = {{val|5|50|30|+errend=%|-errend=%|u=km}}<ref name="LPSC2654"/>
⚫
| period = 869 days <br>(2.38 [[Julian year (astronomy)|yr]])
|rotation={{val|7.26|0.09}}? h<ref name="LPSC2654">{{cite conference
| physical_ref = <ref name="LPSC2654">{{cite conference |title=Cassini Observations of Saturn's Irregular Moons |url=https://www.hou.usra.edu/meetings/lpsc2019/pdf/2654.pdf |first1=T. |last1=Denk |first2=S. |last2=Mottola |conference=50th Lunar and Planetary Science Conference |publisher=[[Lunar and Planetary Institute]] |number=2132 |year=2019}}</ref><ref name="Denk2018"/>
|title=Cassini Observations of Saturn's Irregular Moons
⚫
| mean_diameter = {{val|5|50|30|+errend=%|-errend=%|u=km}}
|url=https://www.hou.usra.edu/meetings/lpsc2019/pdf/2654.pdf
| rotation = {{val|7.26|0.09}}? h
|first1=T. |last1=Denk
| albedo = 0.06 (assumed)
|first2=S. |last2=Mottola
| spectral_type = r – i = 0.36 ± 0.08<ref>{{Cite journal |last1=Peña |first1=José |last2=Fuentes |first2=Cesar |date=2022-05-17 |title=Colors of Irregular Satellites of Saturn with the Dark Energy Camera |journal=The Astronomical Journal |language=en |volume=163 |issue=6 |pages=274 |doi=10.3847/1538-3881/ac6258 |doi-access=free |arxiv=2204.08391 |bibcode=2022AJ....163..274P |issn=1538-3881}}</ref>
|conference=50th Lunar and Planetary Science Conference
| magnitude = 24.5
|publisher=Lunar and Planetary Institute
| abs_magnitude = 15.4
|number=2132
|year=2019}}</ref>
|albedo=0.04 (assumed)<ref name="SheppardPage">[http://www.dtm.ciw.edu/users/sheppard/satellites/satsatdata.html Scott Sheppard's pages]</ref>
}}
}}


'''Skoll''' or '''Saturn XLVII''' (provisional designation '''S/2006 S 8''') is a [[retrograde motion|retrograde]] [[irregular satellite]] of [[Saturn]]. Its discovery was announced by [[Scott S. Sheppard]], [[David C. Jewitt]] and [[Jan Kleyna]] on 26 June 2006 from observations taken between 5 January and 30 April 2006.<ref name="MPEC"/><ref>[http://www.cbat.eps.harvard.edu/iauc/08700/08727.html IAUC 8727: ''Satellites of Saturn''] 30 June 2006 (discovery)</ref>
'''Skoll''' or '''Saturn XLVII''' (provisional designation '''S/2006 S 8''') is a [[retrograde motion|retrograde]] [[irregular satellite]] of [[Saturn]]. Its discovery was announced by [[Scott S. Sheppard]], [[David C. Jewitt]] and [[Jan Kleyna]] on 26 June 2006 from observations taken between 5 January and 30 April 2006.<ref name="MPEC"/><ref>[http://www.cbat.eps.harvard.edu/iauc/08700/08727.html IAUC 8727: ''Satellites of Saturn''] 30 June 2006 (discovery)</ref>


Skoll is about 6 kilometres in diameter (assuming an [[albedo]] of 0.04)<ref name="SheppardPage"/> and orbits Saturn at an average distance of 17.6 [[Giga|G]]m (million km) in 869 days, following a highly [[orbital eccentricity|eccentric]] and moderately [[orbital inclination|inclined]] orbit.
Skoll is about 5 kilometres in diameter (assuming an [[albedo]] of 0.06)<ref name="LPSC2654" /> and orbits Saturn at an average distance of 17.6 [[Giga|G]]m (million km) in 869 days, following a highly [[orbital eccentricity|eccentric]] and moderately [[orbital inclination|inclined]] orbit.<ref name="SheppardPage">[http://www.dtm.ciw.edu/users/sheppard/satellites/satsatdata.html Scott Sheppard's pages]</ref> A rotation period of {{val|7.26|0.04|u=hours}} was obtained by ''[[Cassini–Huygens]]'' in 2016, but this is in strong disagreement with 2013 data for unknown reasons; one possible explanation is variation in the rotation speed and axis due to [[Milankovitch wobble]].<ref name="Denk2018">{{cite book|first1 = T. |last1 = Denk|first2 = S. |last2 = Mottola|first3 = W. F. |last3 = Bottke|first4 = D. P. |last4 = Hamilton|date = 2018|title = Enceladus and the Icy Moons of Saturn|chapter = The Irregular Satellites of Saturn|url = https://tilmanndenk.de/wp-content/uploads/DenkEtAl2018_IrregularMoons.pdf|publisher = University of Arizona Press|volume = 322|pages = 409–434|isbn = 9780816537488|doi = 10.2458/azu_uapress_9780816537075-ch020|bibcode = 2018eims.book..409D}}</ref>


It was named in April 2007<ref>[http://www.cbat.eps.harvard.edu/iauc/08800/08826.html IAUC 8826: ''Satellites of Jupiter and Saturn''] 5 April 2007 (naming the moon)</ref> after [[Skoll|Sköll]], a giant wolf from [[Norse mythology]], son of [[Fenrisulfr|Fenrir]] and twin brother of [[Hati Hróðvitnisson|Hati]].
It was named in April 2007 after [[Sköll]], a giant wolf from [[Norse mythology]], son of [[Fenrir]] and twin brother of [[Hati Hróðvitnisson|Hati]].<ref>{{Cite web |title=IAUC 8826: Sats OF JUPITER, SATURN; RING OF URANUS; 2006 VV_2 |url=http://www.cbat.eps.harvard.edu/iauc/08800/08826.html |access-date=2022-10-06 |website=www.cbat.eps.harvard.edu}}</ref>


==References==
==References==
{{reflist}}
{{reflist}}
⚫
* [http://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html MPC: Natural Satellites Ephemeris Service]
⚫
*Mean orbital parameters [http://ssd.jpl.nasa.gov/?sat_elem from NASA JPL]


==External links==
==External links==
{{Commons category|Skoll (moon)}}
{{Commons category|Skoll (moon)}}
⚫
*[http://www.minorplanetcenter.org/iau/NatSats/NaturalSatellites.html MPC: Natural Satellites Ephemeris Service]
⚫
*Mean orbital parameters [http://ssd.jpl.nasa.gov/?sat_elem from NASA JPL]
*[http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt's pages]<!-- Broken 2013-10-28 -->
*[http://www.ifa.hawaii.edu/~jewitt/irregulars.html David Jewitt's pages]<!-- Broken 2013-10-28 -->


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[[Category:Discoveries by Scott S. Sheppard]]
[[Category:Discoveries by Scott S. Sheppard]]
[[Category:Astronomical objects discovered in 2006]]
[[Category:Astronomical objects discovered in 2006]]
[[Category:Moons with a retrograde orbit]]

Latest revision as of 23:10, 28 October 2024

Skoll
Image of Skoll taken by Cassini on February 23, 2016
Discovery[1]
Discovered byS. S. Sheppard
D. C. Jewitt
J. Kleyna
Discovery date2006
Designations
Designation
Saturn XLVII
PronunciationEnglish: /skɒl/
Old Norse: [skœlː] (approximately /skɜːrl/)
Named after
Sköll
S/2006 S 8
Orbital characteristics[2]
17560000 km
Eccentricity0.418
869 days
(2.38 yr)
Inclination156°
Satellite ofSaturn
GroupNorse group
Physical characteristics[3][4]
5+50%
−30% km
7.26±0.09? h
Albedo0.06 (assumed)
Spectral type
r – i = 0.36 ± 0.08[5]
24.5
15.4

Skoll or Saturn XLVII (provisional designation S/2006 S 8) is a retrograde irregular satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt and Jan Kleyna on 26 June 2006 from observations taken between 5 January and 30 April 2006.[2][6]

Skoll is about 5 kilometres in diameter (assuming an albedo of 0.06)[3] and orbits Saturn at an average distance of 17.6 Gm (million km) in 869 days, following a highly eccentric and moderately inclined orbit.[7] A rotation period of 7.26±0.04 h was obtained by Cassini–Huygens in 2016, but this is in strong disagreement with 2013 data for unknown reasons; one possible explanation is variation in the rotation speed and axis due to Milankovitch wobble.[4]

It was named in April 2007 after Sköll, a giant wolf from Norse mythology, son of Fenrir and twin brother of Hati.[8]

References

[edit]
  1. ^ Discovery Circumstances from JPL
  2. ^ a b "MPEC 2006-M45: Eight New Satellites of Saturn". 26 June 2006.
  3. ^ a b Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
  4. ^ a b Denk, T.; Mottola, S.; Bottke, W. F.; Hamilton, D. P. (2018). "The Irregular Satellites of Saturn". Enceladus and the Icy Moons of Saturn (PDF). Vol. 322. University of Arizona Press. pp. 409–434. Bibcode:2018eims.book..409D. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537488.
  5. ^ Peña, José; Fuentes, Cesar (17 May 2022). "Colors of Irregular Satellites of Saturn with the Dark Energy Camera". The Astronomical Journal. 163 (6): 274. arXiv:2204.08391. Bibcode:2022AJ....163..274P. doi:10.3847/1538-3881/ac6258. ISSN 1538-3881.
  6. ^ IAUC 8727: Satellites of Saturn 30 June 2006 (discovery)
  7. ^ Scott Sheppard's pages
  8. ^ "IAUC 8826: Sats OF JUPITER, SATURN; RING OF URANUS; 2006 VV_2". www.cbat.eps.harvard.edu. Retrieved 6 October 2022.
[edit]
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