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Betelgeuse, Alpha Orionis

Semiregular Variable, type SR c, in Orion

Right Ascension 05 : 55 : 10.3 (h:m)
Declination +07 : 24 : 25 (deg:m)
Distance 650 (ly)
Visual brightness 0.40 .. 1.3 (mag)
Period about 2070 (days)
Spectra type M1-2 Ia-Iab


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Hartmut Frommert
Christine Kronberg
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