Mirach

URI: https://gptkb.org/entity/Mirach
GPTKB entity
Statements (33)
Predicate Object
gptkbp:instanceOf gptkb:star
gptkbp:apparentMagnitude 2.05
gptkbp:BayerDesignation gptkb:β_Andromedae
gptkbp:catalogue gptkb:HD_6860
gptkb:HIP_5447
gptkb:HR_337
gptkb:SAO_37329
gptkbp:colorIndexB-V +1.54
+1.87
gptkbp:companionStarName gptkb:Mirach_B
gptkbp:constellation gptkb:Andromeda
gptkbp:declination +35° 37′ 14.02″
gptkbp:diameter 100 solar radii
gptkbp:discoveredBy ancient astronomers
gptkbp:distanceFromEarth 197 light years
gptkbp:hasCompanion yes
https://www.w3.org/2000/01/rdf-schema#label Mirach
gptkbp:luminosity 1,900 times Sun
gptkbp:mass 2.5 solar masses
gptkbp:metallicity -0.09 [Fe/H]
gptkbp:notableFor used as a guide star for locating other deep sky objects
gptkbp:otherName gptkb:Beta_Andromedae
gptkbp:parallax 16.42 mas
gptkbp:properMotionRA +180.23 mas/yr
-112.23 mas/yr
gptkbp:radialVelocity -13.2 km/s
gptkbp:rightAscension 01h 09m 43.923s
gptkbp:spectralType M0III
gptkbp:temperature 3,842 K
gptkbp:variableStar semi-regular
gptkbp:visibleToNakedEye yes
gptkbp:bfsParent gptkb:Andromeda
gptkbp:bfsLayer 6