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・ Sanzhuang Township, Hebei
・ Sanzi
・ Sanzigen
・ Sanzinia madagascariensis
・ Sanziniinae
・ Sanzo Nosaka
・ Sanzo Wada
・ Sanzoku Diary
・ Sanzoku no Musume Rōnya
・ Sanzoles
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・ SAO
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Sao (moon)
・ SAO 206462
・ SAO Bosanska Krajina
・ SAO Cambodia
・ Sao civilisation
・ Sao Domingos Mine
・ SAO Eastern Slavonia, Baranja and Western Syrmia
・ Sao Edward Yang Kyein Tsai
・ Sao Francisco black tyrant
・ Sao Francisco Craton
・ Sao Frest Forest Park
・ Sao Hai District
・ SAO Herzegovina
・ Sao Hin
・ Sao Hkun Hkio


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Sao (moon) : ウィキペディア英語版
Sao (moon)

Sao ( ; Greek: ''Σαώ'') is a prograde irregular satellite of Neptune. It was discovered by Matthew J. Holman ''et al.'' on August 14, 2002.〔
Sao orbits Neptune at a distance of about 22.4 million km and is about 44 kilometers in diameter (assuming an albedo of 0.04).〔
Sao follows an exceptionally inclined and moderately eccentric orbit illustrated on the diagram in relation to other irregular satellites of Neptune. The satellites above the horizontal axis are prograde, the satellites beneath it are retrograde. The yellow segments extend from the pericentre to the apocentre, showing the eccentricity.
The satellite is in so-called Kozai resonance, i.e. its inclination and eccentricity are coupled (the inclination of the orbit decreases while eccentricity increases and ''vice versa'').〔
Sao, or Neptune XI, like many of the outer satellites of Neptune, is named after one of the Nereids; Sao was associated with sailing and is referred to as "The rescuer" or "Safety". Before the announcement of its name on February 3, 2007 (IAUC 8802), Sao was known provisionally as S/2002 N 2.
== References ==

* Ephemeris (from MPC )
* Mean orbital parameters (from JPL )

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