S/2004 S 17
Discovery [1]
Discovered byScott S. Sheppard et al.
Discovery siteMauna Kea Obs.
Discovery date13 December 2004
Orbital characteristics [2]
Epoch 9 August 2022 (JD 2459800.5)
Observation arc15.67 yr (5,725 days)
0.1326708 AU (19,847,000 km)
Eccentricity0.1647702
–2.86 yr (–1043.92 d)
226.13753°
0° 20m 41.48s / day
Inclination168.11825° (to ecliptic)
34.46812°
186.71765°
Satellite ofSaturn
GroupNorse group
Physical characteristics
Mean diameter
≈4 km[3]
Albedo0.04 (assumed)[3]
25.2[3]
16.0[2]

    S/2004 S 17 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 13 December 2004 and 5 March 2005.

    S/2004 S 17 is about 4 kilometres in diameter, and orbits Saturn at an average distance of 19,847,000 kilometres in about 1,044 days, at an inclination of 168.1° to the ecliptic, in a retrograde direction and with an eccentricity of 0.165.[2][4]

    This moon was considered lost[5] until its recovery was announced on 12 October 2022.[2]

    References

    1. ↑ Discovery Circumstances from JPL
    2. 1 2 3 4 "MPEC 2022-T129 : S/2004 S 17". Minor Planet Electronic Circular. Minor Planet Center. 12 October 2022. Retrieved 12 October 2022.
    3. 1 2 3 S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
    4. ↑ 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)
    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. S2CID 123117568.
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