Zeta Cygni

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

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:star
gptkbp:age	0.5 billion years
gptkbp:apparentMagnitude	3.20
gptkbp:BayerDesignation	gptkb:Zeta_Cygni
gptkbp:binarySystem	yes
gptkbp:catalogue	gptkb:Henry_Draper_Catalogue gptkb:Hipparcos_Catalogue gptkb:BD_Catalogue gptkb:WDS_Catalogue gptkb:Bright_Star_Catalogue gptkb:FK5_Catalogue gptkb:SAO_Catalogue
gptkbp:component	gptkb:Zeta_Cygni_A gptkb:Zeta_Cygni_B
gptkbp:constellation	gptkb:Cygnus
gptkbp:declination	+30° 13′ 37″
gptkbp:diameter	15 solar radii
gptkbp:discoveredBy	gptkb:William_Herschel
gptkbp:discoveredIn	1782
gptkbp:distanceFromEarth	151 light years
gptkbp:evolutionaryStage	gptkb:giant
gptkbp:hasCompanion	white dwarf
https://www.w3.org/2000/01/rdf-schema#label	Zeta Cygni
gptkbp:luminosity	112 solar luminosities
gptkbp:mass	3.05 solar masses
gptkbp:metallicity	[Fe/H] = -0.01
gptkbp:notableFor	barium star
gptkbp:otherDesignation	gptkb:ζ_Cygni gptkb:ADS_14636 gptkb:BD+29_4264 gptkb:FK5_792 gptkb:GC_29613 gptkb:HIP_104732 gptkb:HR_8115 gptkb:SAO_70917 gptkb:WDS_J21129+3014 gptkb:HD_202109
gptkbp:parallax	21.59 mas
gptkbp:properMotionRA	-0.98 mas/yr -11.16 mas/yr
gptkbp:radialVelocity	-28.2 km/s
gptkbp:rightAscension	21h 12m 56.2s
gptkbp:spectralType	G8IIIp
gptkbp:temperature	4,850 K
gptkbp:variableStar	no
gptkbp:bfsParent	gptkb:Cygnus
gptkbp:bfsLayer	6