S/2004 S 12

Summary

S/2004 S 12
Discovery[1]
Discovered bySheppard et al.
Discovery date2005
Orbital characteristics[2]
19650000 km
Eccentricity0.401
−1048 days
Inclination164.0°
Satellite ofSaturn
GroupNorse group?
Physical characteristics
Mean diameter
5+50%
−30%
 km
24.8

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 May 4, 2005 from observations taken between December 12, 2004 and March 9, 2005.

S/2004 S 12 is about 5 kilometres in diameter, and orbits Saturn at an average distance of 19.906 Gm in 1048.541 days, at an inclination of 164° to the ecliptic (162° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.396.

This moon was considered lost[3][4][5] until its recovery in Canada-France-Hawaii Telescope observations from 2019.[6]

References

  1. ^ Discovery Circumstances from JPL
  2. ^ S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
  3. ^ Beatty, Kelly (4 April 2012). "Outer-Planet Moons Found — and Lost". www.skyandtelescope.com. Sky & Telescope. Archived from the original on 2017-06-07. Retrieved 27 June 2017.
  4. ^ Brozović, Marina; Jacobson, Robert A. (9 March 2017). "The Orbits of Jupiter's Irregular Satellites". The Astronomical Journal. 153 (4): 147. Bibcode:2017AJ....153..147B. doi:10.3847/1538-3881/aa5e4d.
  5. ^ 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.
  6. ^ 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 May 3, 2005 (discovery and ephemeris)