Kiviuq (moon)

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Kiviuq
Provisional or systematic name S / 2000 S 5
Central body Saturn
Properties of the orbit
Major semi-axis 11,110,000 km
Periapsis 7,399,000 km
Apoapsis 14,821,000 km
eccentricity 0.334
Orbit inclination 46.16 °
Orbital time 449.2 d
Mean orbital velocity 1.8 km / s
Physical Properties
Albedo 0.06
Apparent brightness 22.0 likes
Medium diameter ≈ 16 km
Dimensions ≈ 3.3 × 10 16 kg
Medium density 2.3 g / cm 3
Sidereal rotation ≈ 21 h 58 min
Acceleration of gravity on the surface ≈ 0.0344 m / s 2
Escape speed ≈ 23.5 m / s
discovery
Explorer

Brett Gladman et al.

Date of discovery August 7, 2000

Kiviuq (also Saturn XXIV) is one of the smaller outer moons of the planet Saturn .

discovery

The discovery of Kiviuq by a team of Brett Gladman , John J. Kavelaars , Jean-Marc Petit, Hans Scholl , Matthew J. Holman , Brian G. Marsden , Philip D. Nicholson and Joseph A. Burns on August 7th through November 4, 2000 was announced on November 18, 2000. Kiviuq was initially given the provisional designation S / 2000 S 5. The moon was named after Kiviuq , a hero of epic stories in the Inuit world in the arctic regions of Canada , Alaska and Greenland .

Orbit data

Kiviuq orbits Saturn on an eccentric orbit at an average distance of 11,365,000 km in around 449 days and 17 hours. The orbital eccentricity is 0.3336, with the orbit at 46.148 ° strongly inclined towards the ecliptic . Kiviuq belongs to the Inuit group of Saturn's moons.

Structure and physical data

Kiviuq has a diameter of 14 km. Its density of 2.5 g / cm 3 is relatively high compared to the other moons of Saturn. It is probably composed of water ice with a high proportion of silicate rock. It has a very dark surface with an albedo of 0.06, i.e. That is, only 6% of the incident sunlight is reflected . Seen from earth, it is an extremely faint object with an apparent brightness of 22.0 m . The rotation period was measured by the Cassini-Huygens spacecraft and is unusually long at almost 22 hours.

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 .
  2. DLR Institute for Planetary Research: Cassini-Huygens ( Memento of the original from May 2, 2007 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Datasheet of Saturn's moons @1@ 2Template: Webachiv / IABot / berlinadmin.dlr.de
further inside Saturn moons further outside
Iapetus
Semi- major axis  (km) Kiviuq 11,111,000
Ijiraq