Kiviuq (moon)
| Discovery [1] | |
|---|---|
| Discovered by | B. J. Gladman et al. |
| Discovered | in 2000 |
| Mean Orbital elements [2] | |
| Epoch 2000 Feb. 26.00 | |
| Semi-major axis | 11.111 Gm |
| Eccentricity | 0.3288 |
| Inclination | 45.71° * |
| Orbital period | 449.22 d (1.23 yr) |
| Physical characteristics | |
| Mean diameter | 16 km[3] ** |
| Rotation period | 21:49 h[4] |
| Albedo | 0.04[3] assumed |
| Color | light red B-V=0.87 R-V=0.66[5]/0.48[6] |
| Spectral type | D[6] |
| *to the ecliptic **based on the albedo | |
Kiviuq (
/ˈkɪvi.ʌk/ kiv-ee-uk) is a prograde irregular satellite of Saturn. It was discovered by Brett J. Gladman in 2000, and given the temporary designation S/2000 S 5.[7][8] It was named after Kiviuq, a hero of Inuit mythology.[9]
Kiviuq is about 16 kilometres in diameter, and orbits Saturn at an average distance of 11.1 million kilometers in 450 days. It is a member of the Inuit group of irregular satellites. It is light red, and the Kiviuq (Kiviuqan) 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][10]
Kiviuq is believed to be in Kozai resonance, cyclically reducing its orbital inclination while increasing the eccentricity and vice versa.[11]
[edit] 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 these data, the rotation period was measured to 21 hours and 49 minutes[4].
[edit] References
- ^ Discovery Circumstances (JPL)
- ^ Mean orbital parameters from JPL
- ^ a b Scott Sheppard pages
- ^ a b T. Denk, S. Mottola, et al. (2011): Rotation Periods of Irregular Satellites of Saturn. EPSC/DPS conference 2011, Nantes (France), abstract 1452.
- ^ Grav, T.; Holman, M. J.; Gladman, B. J.; Aksnes, K.; Photometric survey of the irregular satellites, Icarus, 166 (2003), pp. 33–45
- ^ a b c Grav, T.; and Bauer, J.; A deeper look at the colors of Saturnian irregular satellites
- ^ IAUC 7521: S/2000 S 5, S/2000 S 6 November 18, 2000 (discovery)
- ^ MPEC 2000-Y14: S/2000 S 3, S/2000 S 4, S/2000 S 5, S/2000 S 6, S/2000 S 10 December 19, 2000 (discovery and ephemeris)
- ^ IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (naming the moon)
- ^ Gladman, B. J.; Nicholson, P. D.; Burns, J. A.; Kavelaars, J. J.; Marsden, B. G.; Holman, M. J.; Grav, T.; Hergenrother, C. W.; Petit, J.-M.; Jacobson, R. A.; and Gray, W. J.; Discovery of 12 satellites of Saturn exhibiting orbital clustering, Nature, 412 (July 12. 2001), pp. 163–166
- ^ Ćuk, M.; and Burns, J. A.; On the Secular Behavior of Irregular Satellites, The Astronomical Journal, Vol. 128 (2004), pp. 2518–2541
- Ephemeris from IAU-MPC NSES
[edit] External links
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