Skoll (moon)

Skoll
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
discovery
Explorer	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 .

discovery

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

• MPEC 2006-M45: Eight New Satellites of Saturn June 26, 2006 (Discovery and Ephemeris)
• MPEC 2006-M48: S / 2006 S 2, S / 2006 S 5, S / 2006 S 8 June 28, 2006 (additional observations from 2004 and 2005)
• IAUC 8727: Satellites of Saturn June 30, 2006 (Discovery)
• IAUC 8826: Satellites of Jupiter and Saturn April 5, 2007 (numbering and naming)

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	Tarqeq