出典:Wikipedia
出典:『Wikipedia』 (2011/04/29 09:32 UTC 版)
Beta Ophiuchi (β Oph, β Ophiuchi) is a K-type giant star in the constellation Ophiuchus. It has the traditional names Cebalrai (Arabic: كلب الراعي kalb al-rā‘ī '"shepherd dog"), Cheleb, or Kelb Alrai, or sometimes just Alrai. Like some other K-type giants, β Ophiuchi has been found to vary very slightly (0.02 magnitudes) in brightness.,