HD 205021

URI: https://gptkb.org/entity/HD_205021

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:star
gptkbp:age	8.2 million years
gptkbp:alsoKnownAs	gptkb:Beta_Cephei
gptkbp:apparentMagnitude	3.23
gptkbp:catalogueNumber	gptkb:ADS_14859 gptkb:GC_30113 gptkb:FK5_813 gptkb:HIP_106032 gptkb:SAO_33693 gptkb:BD+69_1125 gptkb:HR_8221 gptkb:WDS_J21295+7031
gptkbp:constellation	gptkb:Cepheus
gptkbp:declination	+70° 33′ 38″
gptkbp:diameter	6.5 solar radii
gptkbp:discoveredBy	gptkb:John_Flamsteed
gptkbp:distanceFromEarth	690 light years
gptkbp:hasCompanion	gptkb:binary_star_system
gptkbp:luminosity	16,000 times solar luminosity
gptkbp:mass	12 solar masses
gptkbp:metallicity	-0.16 [Fe/H]
gptkbp:parallax	4.74 mas
gptkbp:properMotionRA	-0.98 mas/yr 7.63 mas/yr
gptkbp:radialVelocity	-7.5 km/s
gptkbp:rightAscension	21h 28m 39.6s
gptkbp:rotationPeriod	26 km/s
gptkbp:spectralType	B2IIIev
gptkbp:temperature	26,800 K
gptkbp:variableType	gptkb:Beta_Cephei_variable
gptkbp:bfsParent	gptkb:Beta_Cephei
gptkbp:bfsLayer	7
https://www.w3.org/2000/01/rdf-schema#label	HD 205021