Beta Andromeda

Beta Andromeda (Mirak, Al Mizar)
Podaci posmatranja
SazviježđeAndromeda
Rektascenzija01h 09m 43.9s
Deklinacija+35° 37' 14"
Vidljivi sjaj+2.06 m
Tipizacija
Spektralna klasaM0IIIa
B-V indeks boje1.58
Promjena zvjezdanog tipasemiregularna
Astrometrija
Udaljenost200 SG
(61.3 Pc)
Fizikalne osobine
Masa3-4 M
Luminozitet1900 L
Ostali nazivi
Oznaka po Bayer-uβ Andromeda
Oznaka po Flamsteedu43 Andromeda
Oznaka po BSKHR 337
Oznaka po Henry-Draper kataloguHD 6860
Oznaka po SAO kataloguSAO 54471

Beta Andromeda je druga zvijezda po sjajnosti u sazviježđu Andromeda. Ima prividnu magnitudu gotovo istu kao i Alfa Andromeda od 2.06. Arapski naziv je Mirac,Merah ili Mirak (rebro), porijeklo je naziv za kajš konjskog sedla (arap. Al Mizar). Ubraja se u crvene divove M klase. Ima pratioca s magnitudom od 14 pa time spada i u dvostruke zvijezde. Na udaljenosti oko 7 uglovnih minuta nalazi se galaksija NGC 404.[1][2][3][4]

Reference

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