Английская Википедия:Bestla (moon)

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Шаблон:Short description Шаблон:Infobox planet

Bestla Шаблон:IPAc-en or Saturn XXXIX is a retrograde irregular moon of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 4 May 2005, from observations taken between 13 December 2004 and 5 March 2005.

Description

Bestla is about 7 kilometres in diameter, and orbits Saturn at an average distance of 20,192,000 km in 1088 days, at an inclination of 147° to the ecliptic (151° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.5145.[1] Early observations from 2005 suggested that Bestla had a very high eccentricity of 0.77.[2] Like many of the outer irregular moons of the giant planets, Bestla's eccentricity may vary as a result of the Kozai mechanism. Bestla's rotation period is Шаблон:Val hours.[3] Like Kiviuq, it is likely to be a contact binary or binary object, as its light curve has strong variation in brightness and a plateau-like maximum not seen in the other irregulars.[4]

Name

This moon was named in April 2007 after Bestla, a frost giantess from Norse mythology, who is a mother of Odin.

References

Шаблон:Reflist

External links


Шаблон:Moons of Saturn Шаблон:Saturn