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Alcyone

Eta Tauri, 25 Tauri

Proper NameAlcyone
Bayer DesignationEta Tauri
Flamsteed Number25 Tauri
HR (BSC)1165
HD23630
ConstellationTaurus
Right Ascension3h 48m 25s
Declination+24° 9' 1"
Distance368 light years
113 parsecs
MagnitudeApparent: +2.8
Absolute: -2.4
Spectral ClassB7III Blue Giant
Optimum VisibilityNovember / December
NotesThe brightest star in the Pleiades cluster; an eclipsing binary composed of two blue giants, around which three further dwarf stars orbit

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