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Skoll (moon)

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Moon of Saturn

Skoll
Discovery^[1]
Image of Skoll taken byCassini on February 23, 2016
Discovered by	S. S. Sheppard D. C. Jewitt J. Kleyna
Discovery date	2006
Designations
Designation	Saturn XLVII
Pronunciation	English:/skɒl/ Old Norse:[skœlː](approximately/skɜːrl/)
Named after	Sköll
Alternative names	S/2006 S 8
Orbital characteristics^[2]
Semi-major axis	17560000 km
Eccentricity	0.418
Orbital period (sidereal)	869 days (2.38yr)
Inclination	156°
Satellite of	Saturn
Group	Norse group
Physical characteristics^[3]^[4]
Mean diameter	5+50% −30% km
Synodic rotation period	7.26±0.09? h
Albedo	0.06 (assumed)
Spectral type	r – i = 0.36 ± 0.08^[5]
Apparent magnitude	24.5
Absolute magnitude (H)	15.4

Skoll orSaturn XLVII (provisional designationS/2006 S 8) is aretrograde irregular satellite ofSaturn. Its discovery was announced byScott S. Sheppard,David C. Jewitt andJan 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 analbedo of 0.06)^[3] and orbits Saturn at an average distance of 17.6Gm (million km) in 869 days, following a highlyeccentric and moderatelyinclined orbit.^[7] A rotation period of7.26±0.04 h was obtained byCassini–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 toMilankovitch wobble.^[4]

It was named in April 2007 afterSköll, a giant wolf fromNorse mythology, son ofFenrir and twin brother ofHati.^[8]

References

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^Discovery Circumstancesfrom JPL
^^a ^b"MPEC 2006-M45:Eight New Satellites of Saturn". 26 June 2006.
^^a ^bDenk, T.; Mottola, S. (2019).Cassini Observations of Saturn's Irregular Moons(PDF). 50th Lunar and Planetary Science Conference.Lunar and Planetary Institute.
^^a ^bDenk, 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.
^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.
^IAUC 8727:Satellites of Saturn 30 June 2006 (discovery)
^Scott Sheppard's pages
^"IAUC 8826: Sats OF JUPITER, SATURN; RING OF URANUS; 2006 VV_2".www.cbat.eps.harvard.edu. Retrieved6 October 2022.

External links

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Wikimedia Commons has media related toSkoll (moon).

MPC: Natural Satellites Ephemeris Service
Mean orbital parametersfrom NASA JPL
David Jewitt's pages

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Inuit group (36)

Kiviuq subgroup (20)	S/2023 S 1 S/2019 S 1 S/2004 S 54 S/2004 S 55 S/2020 S 11 S/2019 S 22 Kiviuq S/2023 S 2 S/2019 S 23 S/2020 S 12 S/2005 S 4 S/2019 S 25 S/2020 S 1 Ijiraq S/2019 S 24 S/2007 S 10 S/2019 S 26 S/2020 S 13 S/2023 S 6 S/2023 S 7
Paaliaq	Paaliaq
Siarnaq subgroup (15)	S/2004 S 31 S/2023 S 19 S/2023 S 3 S/2020 S 19 Tarqeq S/2019 S 14 Siarnaq S/2019 S 32 S/2020 S 3 S/2005 S 6 S/2019 S 6 S/2004 S 58 S/2006 S 23 S/2020 S 5 S/2023 S 22

Gallic group (17)

Albiorix
S/2020 S 15
Bebhionn
S/2007 S 8
Saturn LX
S/2019 S 29
S/2023 S 18
S/2023 S 17
S/2007 S 11
Erriapus
S/2019 S 31
Tarvos
S/2020 S 4
S/2019 S 34
S/2005 S 7
S/2006 S 12
S/2004 S 24

Norse group (197)

Low-inclination (12)	S/2023 S 38 Skathi S/2020 S 17 S/2023 S 20 S/2023 S 30 Hyrrokkin Narvi S/2019 S 37 Bestla S/2019 S 11 S/2020 S 27 S/2023 S 46
Kari subgroup (15)	S/2006 S 1 S/2004 S 45 S/2023 S 27 S/2006 S 3 S/2023 S 33 S/2020 S 30 Kari Geirrod S/2019 S 17 S/2019 S 19 S/2019 S 18 S/2004 S 21 S/2004 S 36 S/2019 S 20 S/2006 S 29
Mundilfari subgroup (143)	S/2023 S 50 S/2023 S 9 S/2004 S 56 S/2023 S 8 S/2023 S 11 S/2006 S 21 S/2006 S 22 S/2023 S 13 S/2023 S 10 S/2023 S 12 S/2007 S 5 S/2007 S 7 S/2004 S 37 S/2004 S 47 S/2004 S 40 S/2020 S 14 S/2019 S 27 S/2023 S 14 S/2020 S 16 S/2023 S 16 S/2019 S 3 S/2020 S 7 S/2019 S 28 Skoll S/2019 S 30 S/2023 S 21 S/2023 S 4 S/2020 S 18 S/2020 S 2 S/2019 S 4 S/2020 S 20 S/2004 S 41 S/2004 S 57 S/2006 S 24 S/2004 S 42 S/2023 S 15 S/2023 S 24 S/2004 S 13 S/2007 S 6 S/2019 S 35 S/2006 S 25 Mundilfari S/2006 S 26 S/2019 S 33 S/2023 S 23 S/2020 S 21 S/2004 S 43 S/2006 S 10 S/2019 S 5 S/2023 S 25 S/2004 S 59 S/2006 S 27 Gridr Bergelmir Jarnsaxa S/2023 S 44 S/2020 S 22 S/2004 S 44 Hati S/2004 S 17 S/2004 S 12 S/2020 S 23 Eggther S/2023 S 28 S/2023 S 37 S/2023 S 26 S/2019 S 36 S/2006 S 13 S/2023 S 48 S/2023 S 29 S/2007 S 9 Farbauti S/2019 S 9 S/2023 S 32 S/2020 S 24 Aegir S/2019 S 10 Beli S/2023 S 31 S/2020 S 25 S/2023 S 34 S/2023 S 39 S/2019 S 12 S/2004 S 61 S/2006 S 14 S/2023 S 40 Gunnlod S/2019 S 15 S/2020 S 6 S/2020 S 26 S/2023 S 41 S/2004 S 7 S/2005 S 5 S/2006 S 16 S/2023 S 49 S/2006 S 15 S/2023 S 42 S/2004 S 28 S/2020 S 32 S/2020 S 8 S/2020 S 28 S/2019 S 38 S/2004 S 48 S/2023 S 36 S/2023 S 35 S/2020 S 29 Fenrir S/2004 S 50 S/2006 S 17 S/2004 S 49 S/2020 S 34 S/2020 S 31 S/2023 S 43 Surtur S/2006 S 18 S/2020 S 36 Loge S/2020 S 33 S/2004 S 39 S/2019 S 16 S/2004 S 53 S/2023 S 45 Thiazzi S/2020 S 38 S/2020 S 40 S/2019 S 40 S/2019 S 42 Saturn LXIV S/2020 S 39 S/2019 S 41 Fornjot S/2023 S 47 S/2004 S 51 S/2020 S 10 S/2020 S 42 S/2020 S 9 S/2023 S 5 S/2020 S 41 S/2019 S 21 S/2004 S 52 S/2020 S 43 S/2019 S 43 S/2020 S 44
Phoebe subgroup (27)	Phoebe S/2006 S 20 S/2006 S 9 S/2007 S 2 S/2019 S 2 Greip Suttungr S/2004 S 60 S/2007 S 3 S/2006 S 11 S/2019 S 7 S/2019 S 8 Thrymr S/2004 S 46 Angrboda Gerd S/2019 S 13 Skrymir S/2006 S 28 Alvaldi Ymir S/2020 S 35 S/2020 S 37 S/2019 S 39 S/2006 S 19 Saturn LVIII S/2019 S 44

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