Hati (moon)
Hati | |
---|---|
Provisional or systematic name | S / 2004 S 14 |
Central body | Saturn |
Properties of the orbit | |
Major semi-axis | 19,856,000 km |
Periapsis | 12,470,000 km |
Apoapsis | 27,242,000 km |
eccentricity | 0.372 |
Orbit inclination | 165.8 ° |
Orbital time | 1038.7 d |
Mean orbital velocity | 1.34 km / s |
Physical Properties | |
Apparent brightness | 24.4 mag |
Medium diameter | ≈ 6 km |
Dimensions | ≈ kg |
Sidereal rotation | ≈ 5 h 27 min |
Acceleration of gravity on the surface | ≈ 0 m / s 2 |
Escape speed | ≈ 0 m / s |
discovery | |
Explorer |
David C. Jewitt , Scott S. Sheppard , |
Date of discovery | December 12, 2004 |
Hati (also Saturn XLIII) is one of the smaller outer moons of the planet Saturn .
discovery
The discovery of Hati by David C. Jewitt , Scott S. Sheppard , Jan Kleyna and Brian G. Marsden on recordings from December 12, 2004 to March 11, 2005, was announced on May 3, 2005.
Hati was initially given the provisional designation S / 2004 S 14. In April 2007, the moon was named after the giant wolf Hati , a son of the Fenris wolf and twin brother of the giant wolf Skalli (or Skoll), from Nordic mythology .
Orbit data
Hati orbits Saturn in a retrograde eccentric orbit in around 1038.7 days. The orbit eccentricity is 0.372, with the orbit inclined by 165.8 ° to the ecliptic .
Structure and physical data
Hati is about 6 km in diameter and a day-night cycle lasts about 5½ hours. This is the shortest known period of rotation for a moon in the entire solar system.
Web links
- MPEC 2005-J13: Twelve New Satellites of Saturn May 3, 2005 (Discovery and Ephemeris)
- IAUC 8523: New Satellites of Saturn May 4, 2005 (discovery)
- MPEC 2006-C74: S / 2004 S 8, S / 2004 S 14 February 14, 2006 (rediscovery)
- IAUC 8826: Satellites of Jupiter and Saturn April 5, 2007 (numbering and naming)
Individual evidence
- ↑ 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 27 |
Semi- major axis (km) Hati 19,856,000 |
Bestla |