Skoll (moon)

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Provisional or systematic name S / 2006 S 8
Central body Saturn
Properties of the orbit
Major semi-axis 17,665,000 km
Periapsis 9,468,000 km
Apoapsis 25,862,000 km
eccentricity 0.464
Orbit inclination 161.0 °
Orbital time 878.3 d
Mean orbital velocity 1.39 km / s
Physical Properties
Apparent brightness 24.5 mag
Medium diameter ≈ 6 km
Dimensions kg
Sidereal rotation ≈ 7 h 16 min
Acceleration of gravity on the surface ≈ 0 m / s 2
Escape speed ≈ 0 m / s

Scott S. Sheppard , David C. Jewitt ,
Jan Kleyna , Brian G. Marsden

Date of discovery January 5, 2006

Skoll (also Saturn XLVII) is one of the smaller outer moons of the planet Saturn .


The discovery of Skoll by Scott S. Sheppard , David C. Jewitt , Jan Kleyna and Brian G. Marsden on recordings from January 5 to April 30, 2006 was announced on June 26, 2006.
Skoll was initially given the provisional designation S / 2006 S 8. In April 2007, the moon was named after the giant wolf Skalli (also Skoll), a son of the Fenris wolf and twin brother of the giant wolf Hati , from Nordic mythology .

Orbit data

Skoll orbits Saturn on a retrograde eccentric orbit in around 878 days. The orbital eccentricity is 0.46, with the orbit inclined by 161 ° to the ecliptic.

Structure and physical data

Skoll has a diameter of about 6 km.

Space probe observations

On November 9 and 10, 2013, the ISS camera of the Cassini space probe captured 252 images over a period of 36.5 hours, of which only about 30% were received due to heavy rain and wind in the region around the receiving station near Canberra could become. The distance between Cassini and Skoll was 11.5 million kilometers; at a phase angle of 42 °, the moon of Saturn reached a brightness of 15.5  mag . Another observation of about 30 hours took place on February 22, 2016; With this data, the rotation period could then be determined with certainty. From Earth, Skoll is about 4000 times darker at a brightness of 24.5 mag and can only be observed with large telescopes.

Web links

Individual evidence

  1. a b T. Denk, S. Mottola (2019): Studies of irregular satellites: I. Lightcurves and rotation periods of 25 Saturnian moons from Cassini observations. Icarus 322 , 80-102. DOI: 10.1016 / j.icarus.2018.12.040 .
further inside Saturn moons further outside
S / 2004 S 31
Semi- major axis  (km) Skoll 17,665,000