Kiviuq (moon)

Kiviuq
Kiviuq imaged by the Canada-France-Hawaii Telescope in September 2000
Discovery[1]
Discovered byJ. J. Kavelaars et al.
Discovery date18 November 2000
Designations
Designation
Saturn XXIV
Pronunciation/ˈkɪvi.ʌk/
Named after
Kiviuq
S/2000 S 5
AdjectivesKiviupian, Kiviuqian[a]
Orbital characteristics[2]
Epoch 2000 January 1.5
11.307 million km
Eccentricity0.182
449.13 d
(1.23 yr)
Inclination48.9
Satellite ofSaturn
GroupInuit group (Kiviuq)
Physical characteristics
Dimensions38.42 × 17 × 7.64 km[3][b]
17+50%
−30% km[4]
21.97±0.16 h[4]
Albedo0.06 assumed[4]
Spectral type
B−V=0.87
R−V=0.66[5]/0.48[6]
D-type[6]
22.0[7]
12.6[7]

Kiviuq is a prograde irregular satellite of Saturn. It was discovered by J. J. Kavelaars et al. in 2000,[8] and given the temporary designation S/2000 S 5.[9][10] It was named after Kiviuq, a hero of Inuit mythology.[11]

Kiviuq is about 17 km in diameter, and orbits Saturn at an average distance of 11.3 million kilometers in 449 days. It is a member of the Inuit group of irregular satellites. It is light red, and the Kiviupian (Kiviuqan)[a] infrared spectrum is very similar to the Inuit-group satellites Siarnaq and Paaliaq, supporting the thesis of a possible common origin of the Inuit group in the break-up of a larger body.[6][12]

Kiviuq is believed to be in Kozai resonance, cyclically reducing its orbital inclination while increasing the eccentricity and vice versa.[13] Its current orbital elements overlap strongly with Phoebe's orbit, and the moons will likely eventually collide with each other.[7]

The light curve amplitude of Kiviuq is large, varying in brightness by over 2 magnitudes. The large amplitude of Kiviuq suggests that it has an elongated shape, and may be a possible contact binary.[4]

Exploration

On 30 August 2010, the ISS camera of the Cassini–Huygens spacecraft took light-curve data from a distance of 9.3 million km. With this data, the rotation period was measured to be 21 hours and 49 minutes.[14]

Notes

  1. ^ a b The genitive form of Kiviuq is Kiviup. Thus the adjectival form could be absolutive Kiviuqian or genitive Kiviupian, parallel to nominative Venusian and genitive Venerian for Venus. See Inuktitut morphology
  2. ^ Modeled using the diameter calculated from the assumed albedo.

References

  1. ^ "Planetary Satellite Discovery Circumstances". ssd.jpl.nasa.gov.
  2. ^ "Planetary Satellite Mean Elements". ssd.jpl.nasa.gov.
  3. ^ Melnikov, A. V.; Kopylova, Yu. G. (2022-12-01). "Simulation of the Rotational Dynamics and Light Curves of Saturn's Small Moons in the Fast Rotation Mode". Solar System Research. 56 (6). Springer Link: 403–410. doi:10.1134/S0038094622050045. ISSN 1608-3423.
  4. ^ a b c d Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
  5. ^ Grav, Tommy; Holman, Matthew J.; Gladman, Brett; Aksnes, Kaare (November 2003). "Photometric Survey of the Irregular Satellites". Icarus. 166 (1): 33–45. arXiv:astro-ph/0301016. Bibcode:2003Icar..166...33G. doi:10.1016/j.icarus.2003.07.005.
  6. ^ a b c 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.
  7. ^ a b c Denk, Tilmann; Mottola, Stefano; Tosi, Frederico; Bottke, William F.; Hamilton, Douglas P. (2018). "The Irregular Satellites of Saturn" (PDF). In Schenk, P.M.; Clark, R.N.; Howett, C.J.A.; Verbiscer, A.J.; Waite, J.H. (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 9780816537075.
  8. ^ Kavelaars, J. J.; Holman, M. J.; Grav, T.; Milisavljevic, D.; Fraser, W.; Gladman, B. J.; Petit, J. -M.; Rousselot, P.; Mousis, O.; Nicholson, P. D. (2004-06-01). "The discovery of faint irregular satellites of Uranus". Icarus. 169 (2): 474. Bibcode:2004Icar..169..474K. doi:10.1016/j.icarus.2004.01.009. ISSN 0019-1035.
  9. ^ "IAUC 7521: S/2000 S 5, S/2000 S 6". www.cbat.eps.harvard.edu. November 18, 2000.
  10. ^ "MPEC 2000-Y14 : S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10". minorplanetcenter.net. December 19, 2000.
  11. ^ "IAUC 8177: Sats OF (22); Sats OF JUPITER, SATURN, URANUS". www.cbat.eps.harvard.edu. August 8, 2003.
  12. ^ 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. doi:10.1038/35084032. ISSN 1476-4687. PMID 11449267.
  13. ^ Cuk, Matija; Burns, Joseph A. (November 2004). "On the Secular Behavior of Irregular Satellites". The Astronomical Journal. 128 (5): 2518–2541. arXiv:astro-ph/0408119. Bibcode:2004AJ....128.2518C. doi:10.1086/424937. ISSN 0004-6256.
  14. ^ Denk, T; Mottola, S (2011). Rotation periods of irregular satellites of Saturn (PDF). EPSC/DPS conference 2011. Vol. 6.
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