β UMa

URI: https://gptkb.org/entity/β_UMa
GPTKB entity
Statements (32)
Predicate Object
gptkbp:instanceOf gptkb:star
binary star system
red supergiant
gptkbp:apparentMagnitude 2.37
gptkbp:BayerDesignation gptkb:Beta_Ursae_Majoris
gptkbp:catalogueNumber gptkb:HD_95418
gptkb:HIP_53910
gptkb:HR_4295
gptkbp:constellation gptkb:Ursa_Major
gptkbp:declination +56° 22′ 57″
gptkbp:diameter 2.84 solar radii
gptkbp:discoveredBy known since antiquity
gptkbp:distanceFromEarth 79.7 light years
gptkbp:FlamsteedDesignation gptkb:48_Ursae_Majoris
gptkbp:hasCompanion yes
https://www.w3.org/2000/01/rdf-schema#label β UMa
gptkbp:isNavigationalStar true
gptkbp:luminosity 68 times solar luminosity
gptkbp:mass 2.7 solar masses
gptkbp:metallicity [Fe/H] = -0.04
gptkbp:name gptkb:Merak
gptkbp:otherName gptkb:Merak
gptkbp:parallax 40.90 mas
gptkbp:partOf gptkb:Big_Dipper
gptkbp:radialVelocity -13.3 km/s
gptkbp:rightAscension 11h 01m 50.5s
gptkbp:rotationPeriod 46 km/s
gptkbp:spectralType A1IV
gptkbp:temperature 9340 K
gptkbp:visibleToNakedEye true
gptkbp:bfsParent gptkb:Merak
gptkbp:bfsLayer 7