Inuit group
Kiviuq · Ijiraq · Paaliaq · Siarnaq · Tarqeq
The
The
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 twelve known members of the Inuit group are (sorted by distance from Saturn in their respective subgroups):
| Name | Diameter (Km) | Period (days)[4] |
|---|---|---|
| S/2019 S 1 | 6 | 445.51 |
| Kiviuq | 19 | 449.13 |
| S/2005 S 4 | 5 | 450.22 |
| S/2020 S 1 | 4 | 451.10 |
| Ijiraq | 15 | 451.46 |
| Paaliaq | 30 | 687.08 |
| S/2004 S 31 | 5 | 866.10 |
| Tarqeq | 7 | 884.98 |
| S/2019 S 14 | 4 | 893.14 |
| Siarnaq | 39.3 | 895.87 |
| S/2020 S 3 | 3 | 907.99 |
| S/2020 S 5 | 3 | 933.88 |
In addition, S/2019 S 6 has also been categorized in the Inuit group by some sources.[a]
See also
Notes
- ^ JPL's mean orbital elements suggest an inclination that is similar to those of the Gallic group; however other sources say it belongs to the Inuit group.
References
- doi:10.1016/j.icarus.2003.07.005 – via ArXiv.
- .
- doi:10.1016/j.icarus.2007.04.020 – via ArXiv.
- ^ "Planetary Satellite Mean Elements". Jet Propulsion Laboratory. California Institute of Technology. 25 January 2024.
External links
Mean orbital parameters: from JPL
