Albireo


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Albireo

(al-beer -ee-oh) (β Cyg) A beautiful double star, the second brightest star in the constellation Cygnus. The primary is an orange giant with a deep blue companion 35″ away. mv : 3.1 (A), 5.1 (B); spectral type: K5 II (A), B8 V (B).
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