Alpha Ursae Minoris

URI: https://gptkb.org/entity/Alpha_Ursae_Minoris

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:star binary star system
gptkbp:alsoKnownAs	gptkb:Polaris
gptkbp:apparentMagnitude	1.98 -3.64
gptkbp:catalogueNumber	gptkb:HR_424 gptkb:2MASS_J02314909+8915508 gptkb:GC_2253 gptkb:GSC_04664-00616 gptkb:TYC_4664-616-1 gptkb:WDS_J02319+8915 gptkb:BD+88_8 gptkb:FK5_907 gptkb:HD_8890 gptkb:HIP_11767 gptkb:SAO_308 gptkb:AAVSO_0227+88 gptkb:ADS_1477
gptkbp:constellation	gptkb:Ursa_Minor
gptkbp:declination	+89° 15′ 50.8″
gptkbp:diameter	37.5 solar radii
gptkbp:discoveredBy	known since antiquity
gptkbp:distanceFromEarth	433 light years
gptkbp:epoch	gptkb:J2000
gptkbp:hasCompanion	gptkb:Polaris_B Polaris Ab
https://www.w3.org/2000/01/rdf-schema#label	Alpha Ursae Minoris
gptkbp:isNorthStar	true
gptkbp:luminosity	1,260 times Sun
gptkbp:mass	5.4 solar masses
gptkbp:metallicity	[Fe/H] = 0.07
gptkbp:name	gptkb:Polaris
gptkbp:orbitalPeriodOfAb	29.59 years
gptkbp:orbitalPeriodOfB	unknown
gptkbp:parallax	7.54 mas
gptkbp:radialVelocity	-16.6 km/s
gptkbp:rightAscension	02h 31m 49.09s
gptkbp:spectralType	F7:Ib-II
gptkbp:temperature	6015 K
gptkbp:variableType	variable star
gptkbp:bfsParent	gptkb:Nord gptkb:Polaris gptkb:The_North_Star
gptkbp:bfsLayer	5