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Paaliaq

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Paaliaq
Time lapse of Paaliaq moving along its orbit that lead to its discovery
Discovery[1]
Discovered byJ. J. Kavelaars et al.
Discovery dateOctober 2000
Designations
Designation
Saturn XX
Pronunciation/ˈpɑːli.ɑːk/
S/2000 S 2
AdjectivesPaaliapian, Paaliaqian[a]
Orbital characteristics[2]
Epoch 2000 January 1.5
14 997 700 km
Eccentricity0.378
685.7 d
(1.88 yr)
Inclination48.5° (to ecliptic)
Satellite ofSaturn
GroupInuit group (Paaliaq)
Physical characteristics
29 km[3]
25 km[4]
22 km[5]
Mass2.94×1016 kg (calculated)
Mean density
2.3 g/cm3 (assumed)[3]
18.79±0.09 h[4]
Albedo<0.15[6]
<0.10 (likely)[6]
0.06 (assumed)[4][3][5]
Spectral type
red/D[7]
B−V=0.86, R−V=0.40[7]
21.3 (R band)[4]
11.38±0.26 (V band)[3]
11.7[4]

Paaliaq is a prograde irregular satellite of Saturn. It was discovered by J. J. Kavelaars, Brett J. Gladman, Jean-Marc Petit, Hans Scholl, Matthew J. Holman, Brian G. Marsden, Philip D. Nicholson and Joseph A. Burns in early October 2000,[8][9][10] and given the temporary designation S/2000 S 2. It was named in August 2003 after a fictional shaman in the book The Curse of the Shaman, written by Michael Kusugak, who supplied Kavelaars with the names of giants from Inuit mythology that were used for other Saturnian moons.[11]

Physical characteristics

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Paaliaq is thought to be about 29 kilometres in diameter, and orbits Saturn at an average distance of 15.0 million km in 687 days. It is a member of the Inuit group of irregular satellites.

It is light red in color, and in the infrared the Paaliapian (Paaliaqan)[a] spectrum is very similar to the Inuit-group satellites Kiviuq and Siarnaq, supporting the thesis of a possible common origin of the Inuit group in the break-up of a larger body.[7][8] Its light curve has an unusual pattern of four minima, suggesting that it has a very peculiar shape.[4]

Paaliaq imaged by the CFHT on 23 September 2000

Notes

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  1. 1 2 The genitive form of Paaliaq is Paaliap. Thus the adjectival form could be absolutive Paaliaqian or genitive Paaliapian, parallel to nominative Venusian and genitive Venerian for Venus. See Inuktitut morphology

References

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  1. ↑ Discovery Circumstances (JPL)
  2. ↑ "Planetary Satellite Mean Elements". ssd.jpl.nasa.gov.
  3. 1 2 3 4 Emelyanov, N. V.; Varfolomeev, M. I.; Lainey, V. (24 March 2022). "New ephemerides of outer planetary satellites". Monthly Notices of the Royal Astronomical Society. 512 (2): 2044–2050. Bibcode:2022MNRAS.512.2044E. doi:10.1093/mnras/stac586.
  4. 1 2 3 4 5 6 Denk, Tilmann; Mottola, Stefano; Tosi, Frederico; Bottke, William F.; Hamilton, Douglas P. (2018). "The Irregular Satellites of Saturn" (PDF). In Schenk, Paul M.; Clark, Roger Nelson; Howett, Carly J.A.; Verbiscer, Anne J.; Waite, John Hunter (eds.). Enceladus and the Icy Moons of Saturn. Space Science Series. Vol. 322. Tucson, AZ: The University of Arizona Press. pp. 409–434. Bibcode:2018eims.book..409D. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 978-0-8165-3707-5. JSTOR j.ctv65sw2b.37. LCCN 2017056126. OCLC 1055049948.
  5. 1 2 "Paaliaq - NASA Science". 29 November 2017.
  6. 1 2 Mueller, Michael; Grav, T.; Trilling, D.; Stansberry, J.; Sykes, M. (October 10–15, 2008). Size and Albedo of Irregular Saturnian Satellites from Spitzer Observations. 40st DPS meeting of the American Astronomical Society. Bulletin of the American Astronomical Society. Vol. 40. Ithaca, NY, United States (published 2008-09-01). p. 511. Bibcode:2008DPS....40.6108M. hdl:11370/10069be7-7c40-4339-b716-58ec39c944a9.
  7. 1 2 3 Grav, T.; Bauer, J. (2007-03-08) [2006-11-18]. "A deeper look at the colors of the Saturnian irregular satellites". Icarus. 191 (1): 267–285. arXiv:astro-ph/0611590. Bibcode:2007Icar..191..267G. doi:10.1016/j.icarus.2007.04.020. S2CID 15710195.
  8. 1 2 Gladman, Brett; Kavelaars, J. J.; Holman, Matthew; Nicholson, Philip D.; Burns, Joseph A.; Hergenrother, Carl W.; Petit, Jean-Marc; Marsden, Brian G.; Jacobson, Robert; Gray, William; Grav, Tommy (2001-07-12). "Discovery of 12 satellites of Saturn exhibiting orbital clustering". Nature. 412 (6843): 163–166. Bibcode:2001Natur.412..163G. doi:10.1038/35084032. ISSN 1476-4687. PMID 11449267. S2CID 4420031.
  9. ↑ "IAUC 7512: S/2000 S 1, S/2000 S 2". www.cbat.eps.harvard.edu. 25 October 2000. (discovery)
  10. ↑ "MPEC 2000-Y15 : S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9". minorplanetcenter.net. 19 December 2000. (discovery and ephemeris)
  11. ↑ Petten, Cheryl. "Naming Saturn's moons". Ammsa.com. Aboriginal Multi-Media Society. The fourth name, Paaliaq, is a character Kusugak created in his latest book, Marble Island-The Curse of the Shaman, which Kusugak is currently trying to get published. The characters Kiviuq and Siarnaq are also found in the book.
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