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Greip (pronounced /ˈɡreɪp/ "grape"), or Saturn LI (provisional designation S/2006 S 4), is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on June 26, 2006 from observations taken between January 5 and May 1, 2006. S/2006 S 4 is about 6 kilometres in diameter, and orbits Saturn at an average distance of 18,066 Mm in 906.556 days, at an inclination of 172.7° to the ecliptic (159.2° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.3735.

It is named after Greip, a giantess in Norse mythology.

References

* Institute for Astronomy Saturn Satellite Data
* IAUC 8727: Satellites of Saturn June 30, 2006 (discovery)
* MPEC 2006-M45: Eight New Satellites of Saturn June 26, 2006 (discovery and ephemeris)
* IAUC 8873: Satellites of Saturn September 20, 2007 (naming)

see also: The Solar System

Astronomy Encyclopedia

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