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Sigma Persei : ウィキペディア英語版 | Sigma Persei
Sigma Persei (Sigma Per, σ Persei, σ Per) is an orange K-type giant with an apparent magnitude of +4.36. It is approximately 353 light years from Earth. Sigma Persei is moving through the Galaxy at a speed of 17.4 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,400 and 43,600 light years from the center of the Galaxy. It came closest to the Sun 5.1 million years ago when it had brightened to magnitude 3.11 from a distance of 202 light years.〔(Sigma Persei (HIP 16335) )〕 ==Name and etymology== This star, together with δ Per, ψ Per, α Per, γ Per and η Per, has been called ''the Segment of Perseus''.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Sigma Persei」の詳細全文を読む
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