S/2006 S 1

S/2006 S 1

Discovery [1]
Discovered by	Scott S. Sheppard David C. Jewitt Jan T. Kleyna
Discovery date	6 March 2006
Orbital characteristics [2]
Epoch 31 May 2020 (JD 2459000.5)
Observation arc	2.13 yr (776 d)
Earliest precovery date	5 January 2005
Semi-major axis	0.1246859 AU (18.65275 Gm)
Eccentricity	0.0814088
Orbital period (sidereal)	−2.604 yr (−951.1 d)
Mean anomaly	351.30293°
Mean motion	0° 22^m 42.627^s / day
Inclination	154.62928° (to the ecliptic)
Longitude of ascending node	351.18965°
Argument of perihelion	176.02188°
Satellite of	Saturn
Group	Norse group
Physical characteristics
Mean diameter	≈5 km[3] ≈3 km[4]
Albedo	0.04 (assumed)[4]
Apparent magnitude	24.5[3]
Absolute magnitude (H)	15.6[2]

S/2006 S 1 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on June 26, 2006 from observations taken between January 4 and April 30, 2006. S/2006 S 1 is about 6 kilometres in diameter, and orbits Saturn at an average distance of 18.65 Gm in 951.1 days, at an inclination of 154.6° to the ecliptic (178.9° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.0814.^[1]

The moon was once considered lost in 2006 as it was not seen since its discovery.^[5][6] The moon was later recovered and announced in October 2019.^[7][3]

References

1. "MPEC 2019-W125 : S/2006 S 1". Minor Planet Electronic Circular. Minor Planet Center. 25 November 2019.
2. "M.P.C. 118845" (PDF). Minor Planet Circular. Minor Planet Center. 12 December 2019.
3. Sheppard, Scott. "Scott S. Sheppard - Saturn Moons". Department of Terrestrial Magnetism. Carnegie Institution for Science. Retrieved 7 October 2019.
4. "In Depth – S/2006 S1". Solar System Exploration. NASA. 19 December 2019. Retrieved 7 October 2019.
5. Beatty, Kelly (4 April 2012). "Outer-Planet Moons Found — and Lost". www.skyandtelescope.com. Sky & Telescope. Retrieved 27 June 2017.
6. 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.
7. "Saturn Surpasses Jupiter After The Discovery Of 20 New Moons And You Can Help Name Them!". Carnegie Science. October 7, 2019.

External links

• Orbits of Saturn Moons
• MPEC 2006-M45: Eight New Satellites of Saturn June 26, 2006 (discovery and ephemeris)
• MPEC 2019-W125 : S/2006 S 1 (recovery)