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Actaea (moon) : ウィキペディア英語版 | Actaea (moon)
Actaea, officially (120347) Salacia I Actaea, is the single known natural satellite of the cubewano 120347 Salacia. Its diameter is estimated 300 km, which is ⅓ of the diameter of Salacia; thus, Salacia is sometimes viewed as a binary asteroid. Actaea is about the sixth-biggest known moon of a Kuiper belt object, after Charon (1212 km), Dysnomia (685 km), Vanth (378 km), Ilmarë (361 km) and Hiiaka (320 km). ==Discovery and name==
It was discovered on 21 July 2006 by Keith S. Noll, Harold Levison, Denise Stephens and Will Grundy with the Hubble Space Telescope.〔 (【引用サイトリンク】title=IAUC 8751: (120347) 2004 SB_60; 2006gi, 2006gj; V733 Cep )〕 On 18 February 2011, it was officially named Actaea after the nereid Aktaia.
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