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Alpha Crucis

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Alpha Crucis

(kroo -sis) (Acrux; α Cru) A conspicuous white star that is the brightest in the constellation Crux. It is a visual binary (separation 4″), both components being spectroscopic binaries. Alpha (α) and Gamma (γ) Crucis point towards the south celestial pole. mv : 1.3 (A), 1.7 (B), 0.76 (AB); Mv : –4.2 (A), 3.2 (B); spectral type: B1 IV (A), B1 V (B); distance: 160 pc.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
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