S/2004 S 12
| Discovery[1] | |
|---|---|
| Discovered by | Scott S. Sheppard et al. |
| Discovery site | Mauna Kea Obs. |
| Discovery date | 12 December 2004 |
| Orbital characteristics[2] | |
| Epoch 9 August 2022 (JD 2459800.5) | |
| Observation arc | 15.61 yr (5,703 days) |
| 0.1327201 AU (19,855,000 km) | |
| Eccentricity | 0.3711930 |
| –2.86 yr (–1044.50 d) | |
| 326.59167° | |
| 0° 20m 40.789s / day | |
| Inclination | 163.85743° (to ecliptic) |
| 330.73760° | |
| 111.13920° | |
| Satellite of | Saturn |
| Group | Norse group |
| Physical characteristics | |
| ≈5 km[3] | |
| Albedo | 0.04 (assumed)[3] |
| 24.8[3] | |
| 15.9[2] | |
S/2004 S 12 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 4 May 2005 from observations taken between 12 December 2004 and 9 March 2005.
S/2004 S 12 is about 5 kilometres in diameter, and orbits Saturn at an average distance of 19,855,000 kilometres in about 1,044 days, at an inclination of 163.9° to the ecliptic, in a retrograde direction and with an eccentricity of 0.371.[2][4]
This moon was considered lost[5] until its recovery was announced on 12 October 2022.[2] (In 2021, it had also been found in Canada-France-Hawaii Telescope observations from 2019.)[6]
References
[edit]- ^ Discovery Circumstances from JPL
- ^ a b c d "MPEC 2022-T128 : S/2004 S 12". Minor Planet Electronic Circular. Minor Planet Center. 12 October 2022. Retrieved 12 October 2022.
- ^ a b c S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
- ^ Jacobson, R.A. (2007) SAT272 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Archived from the original on 2011-08-10. Retrieved 2008-01-20.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ Jacobson, B.; Brozović, M.; Gladman, B.; Alexandersen, M.; Nicholson, P. D.; Veillet, C. (28 September 2012). "Irregular Satellites of the Outer Planets: Orbital Uncertainties and Astrometric Recoveries in 2009–2011". The Astronomical Journal. 144 (5): 132. Bibcode:2012AJ....144..132J. doi:10.1088/0004-6256/144/5/132. S2CID 123117568.
- ^ Ashton, Edward; Gladman, Brett; Beaudoin, Matthew (August 2021). "Evidence for a Recent Collision in Saturn's Irregular Moon Population". The Planetary Science Journal. 2 (4): 12. Bibcode:2021PSJ.....2..158A. doi:10.3847/PSJ/ac0979.
- Institute for Astronomy Saturn Satellite Data
- Jewitt's New Satellites of Saturn page
- MPEC 2005-J13: Twelve New Satellites of Saturn, 3 May 2005 (discovery and ephemeris)
| Geography | |
|---|---|
| Moons | |
| Astronomy | |
| Exploration | |
| Related | |
