Paaliaq (moon)

Paaliaq
Provisional or systematic name	S / 2000 S 2
Central body	Saturn
Properties of the orbit
Major semi-axis	15,198,000 km
Periapsis	9,667,000 km
Apoapsis	20,733,000 km
eccentricity	0.364
Orbit inclination	45.13 °
Orbital time	686.9 d
Mean orbital velocity	1.61 km / s
Physical Properties
Albedo	0.06
Apparent brightness	21.3 mag
Medium diameter	≈ 22 km
Dimensions	≈ 8.2 × 10 15 kg
Medium density	2.3 g / cm 3
Sidereal rotation	≈ 18 h 47 min
Acceleration of gravity on the surface	≈ 0.0045 m / s 2
Escape speed	≈ 10.0 m / s
discovery
Explorer	Brett Gladman et al.
Date of discovery	August 7, 2000

Paaliaq (also Saturn XX) is one of the smaller outer moons of the planet Saturn .

discovery

The discovery of Paaliaq 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 until September 24, 2000 was announced on October 25, 2000. Paaliaq was initially given the provisional designation S / 2000 S 2. In August 2003, the moon was named after a fictional character in the book "The Curse of the Shaman" by Michael Kusugak .

Orbit data

Paaliaq orbits Saturn on an eccentric orbit at an average distance of 15,198,000 km in around 687 days. The orbital eccentricity is 0.3632, whereby the orbit is strongly inclined at 45.077 ° against the ecliptic , which at this distance from Saturn represents the Laplace plane .

Paaliaq belongs to the Inuit group of Saturn's moons.

Structure and physical data

Paaliaq has a diameter of 19 km. Its density of 2.3 g / m ^{3 is} relatively high compared to the other Saturnian moons. 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 . With an apparent brightness of 21.3 ^m , it is an extremely faint object.

Web links

Commons : Paaliaq  - collection of images, videos and audio files

• IAUC 7512: S / 2000 S 1 and S / 2000 S 2 October 25, 2000 (discovery)
• MPEC 2000-Y15: S / 2000 S 1, S / 2000 S 2, S / 2000 S 7, S / 2000 S 8, S / 2000 S 9 December 19, 2000 (ephemeris)
• MPEC 2001-T06: S / 2000 S 1, S / 2000 S 2, S / 2000 S 4, S / 2000 S 6, S / 2000 S 12 October 6, 2001 (rediscovery)
• IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (numbering and naming)

Individual evidence

1. ↑ 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
Phoebe	Semi- major axis  (km) Paaliaq 15,200,000	Skathi