HD 205021

URI: https://gptkb.org/entity/HD_205021
GPTKB entity
Statements (33)
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 binary star system
https://www.w3.org/2000/01/rdf-schema#label HD 205021
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