Bestla (moon)

Bestla
Provisional or systematic name	S / 2004 S 18
Central body	Saturn
Properties of the orbit
Major semi-axis	20,129,000 km
Periapsis	9,642,000 km
Apoapsis	30,616,000 km
eccentricity	0.521
Orbit inclination	145.2 °
Orbital time	1083.6 d
Mean orbital velocity	1.26 km / s
Physical Properties
Apparent brightness	23.8 mag
Medium diameter	≈ 7 km
Dimensions	≈? kg
Sidereal rotation	≈ 14 h 38 min
Acceleration of gravity on the surface	≈ 0 m / s ²
Escape speed	≈ 0 m / s
discovery
Explorer	David C. Jewitt , Scott S. Sheppard , Jan Kleyna , Brian G. Marsden
Date of discovery	December 13, 2004

Bestla (also Saturn XXXIX) is one of the smaller outer moons of the planet Saturn .

discovery

The discovery of Bestla by David C. Jewitt , Scott S. Sheppard , Jan Kleyna and Brian G. Marsden on recordings from December 13, 2004 to March 5, 2005, was announced on May 3, 2005. Bestla was initially given the provisional designation S / 2004 S 18. In April 2007 the moon was named after the ice giant Bestla , mother of the god Odin .

Orbit data

Bestla orbits Saturn on a retrograde eccentric orbit in around 1083 days, or almost exactly 3 years. The orbit eccentricity is 0.521, with the orbit inclined by 145.2 ° to the ecliptic .

Structure and physical data

The diameter of Bestla is estimated to be about 7 km. The mean density and the mineralogical composition of the surface are unknown.

Space probe observations

The telecamera of the Cassini space probe observed Bestla three times in autumn 2009 from a distance of around 8 million kilometers and in September 2012 also three times from a distance of around 11.5 million kilometers. The synodic rotation period was determined to be 14.6 hours.

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-C55: S / 2004 S 10, S / 2004 S 11, S / 2004 S 15, S / 2004 S 18 February 10, 2006 (rediscovery)
IAUC 8826: Satellites of Jupiter and Saturn April 5, 2007 (numbering and naming)

Individual evidence

^ ^A ^b Saturn Satellite and Moon Data , Scott Sheppard website , accessed October 13, 2013.
↑ ^a ^b T. Denk, S. Mottola (2013): Irregular Saturnian Moon Lightcurves from Cassini-ISS Observations: Update. DPS Conference 2013 , Denver (Colorado) , bibcode : 2013DPS .... 4540608D .

further inside	Saturn moons	further outside
Hati	Major semi-axis (km) Bestla 20,129,000	Color auti

[SheppardGiantMoonsSite-1] A ^b Saturn Satellite and Moon Data , Scott Sheppard website , accessed October 13, 2013.

[DenkMottola2013-2] T. Denk, S. Mottola (2013): Irregular Saturnian Moon Lightcurves from Cassini-ISS Observations: Update. DPS Conference 2013 , Denver (Colorado) , bibcode : 2013DPS .... 4540608D .


earth	moon
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Uranus ( list )	Ariel • Belinda • Bianca • Caliban • Cordelia • Cressida • Cupid • Desdemona • Ferdinand • Francisco • Juliet • Mab • Margaret • Miranda • Oberon • Ophelia • Perdita • Portia • Prospero • Puck • Rosalind • Setebos • Stephano • Sycorax • Titania • Trinculo • Umbriel
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Pluto	Charon • Hydra • Kerberos • Nix • Styx
Haumea	Hi'iaka • Namaka
Makemake	S / 2015 (136472) 1
Eris	Dysnomia