Inuit group

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Animation of Saturn's Inuit group of satellites
   Kiviuq ·    Ijiraq ·    Paaliaq ·    Siarnaq ·   Tarqeq
Hill radius
.

The

inclinations between 45° and 50°, and their eccentricities
between 0.11 and 0.39. They take an average of 2 years to orbit Saturn.

The

Inuit mythology
for these moons.

The group appeared quite homogeneous in early observations, the satellites displaying light-red colour (colour indices B−V = 0.79 and V−R = 0.51, similar to that of the Gallic group)[1] and similar infrared spectra.[2] Recent observations, however, revealed that Ijiraq is distinctly redder than Paaliaq, Siarnaq and Kiviuq. In addition, unlike the other three, Ijiraq's spectrum does not display weak absorption near 0.7 μm. This feature is attributed to a possible water hydration.[3]

The spectral homogeneity (with the exception of Ijiraq) is consistent with a common origin in the break-up of a single object but the dispersion of the orbital parameters requires further explanation. Recently reported secular resonances among the members could provide the explanation of the post-collisional dispersion.

Names

The thirty six known members of the Inuit group are (sorted by distance from Saturn in their respective subgroups):

Name Diameter (Km) Period (days)[4] Subgroup
S/2023 S 6 3 436.07 Kiviuq
S/2023 S 1 3 442.99 Kiviuq
S/2019 S 1 5 445.51 Kiviuq
S/2004 S 54 4 446.42 Kiviuq
S/2019 S 22 3 447.31 Kiviuq
S/2019 S 23 3 447.80 Kiviuq
S/2020 S 11 3 448.35 Kiviuq
S/2019 S 25 4 448.87 Kiviuq
Kiviuq 19 449.13 Kiviuq
S/2023 S 2 3 449.12 Kiviuq
S/2004 S 55 3 449.63 Kiviuq
S/2005 S 4 5 450.22 Kiviuq
S/2020 S 12 3 450.27 Kiviuq
S/2020 S 1 4 451.10 Kiviuq
Ijiraq 15 451.46 Kiviuq
S/2019 S 24 4 452.11 Kiviuq
S/2007 S 10 4 453.26 Kiviuq
S/2019 S 26 3 454.51 Kiviuq
S/2020 S 13 3 454.60 Kiviuq
S/2023 S 7 4 474.03 Kiviuq
Paaliaq 30 687.08 Paaliaq
S/2023 S 19 3 861.64 Siarnaq
S/2004 S 31 5 866.10 Siarnaq
S/2023 S 3 3 873.04 Siarnaq
S/2019 S 32 5 880.08 Siarnaq
Tarqeq 7 884.98 Siarnaq
S/2019 S 14 4 893.14 Siarnaq
S/2020 S 19 3 891.98 Siarnaq
Siarnaq 39.3 895.87 Siarnaq
S/2005 S 6 4 896.45 Siarnaq
S/2020 S 3 3 907.99 Siarnaq
S/2004 S 58 5 914.46 Siarnaq
S/2006 S 23 3 914.89 Siarnaq
S/2019 S 6 4 919.71 Siarnaq
S/2020 S 5 3 933.88 Siarnaq
S/2023 S 22 4 933.97 Siarnaq

See also

References

  1. doi:10.1016/j.icarus.2003.07.005
    .
  2. ISSN 0004-637X
    .
  3. doi:10.1016/j.icarus.2007.04.020
    .
  4. ^ "Planetary Satellite Mean Elements". Jet Propulsion Laboratory. California Institute of Technology. 25 January 2024.

Mean orbital parameters: from JPL

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