|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:age
|
0.5 billion years
|
|
gptkbp:apparentMagnitude
|
3.20
|
|
gptkbp:binaryType
|
gptkb:binary_star_system
|
|
gptkbp:component
|
gptkb:Zeta_Cygni_A
gptkb:Zeta_Cygni_B
|
|
gptkbp:declination
|
+30° 13′ 37″
|
|
gptkbp:discoveredBy
|
gptkb:William_Herschel
|
|
gptkbp:discoveredIn
|
1782
|
|
gptkbp:distanceFromEarth
|
151 light years
|
|
gptkbp:hasComponent
|
gptkb:Zeta_Cygni_A
gptkb:Zeta_Cygni_B
|
|
gptkbp:locatedIn
|
gptkb:constellation_Cygnus
|
|
gptkbp:luminosity
|
120 L☉
|
|
gptkbp:metallicity
|
[Fe/H] = -0.01
|
|
gptkbp:orbitType
|
6489 days
|
|
gptkbp:otherDesignation
|
gptkb:ζ_Cygni
gptkb:HIP_104732
gptkb:HR_8115
gptkb:HD_202109
|
|
gptkbp:parallax
|
21.59 mas
|
|
gptkbp:primaryMass
|
3.05 solar masses
|
|
gptkbp:primarySpectralType
|
G8IIIp
|
|
gptkbp:properMotionRA
|
-2.13 mas/yr
-0.41 mas/yr
|
|
gptkbp:radialVelocity
|
-16.5 km/s
|
|
gptkbp:rightAscension
|
21h 12m 56.2s
|
|
gptkbp:secondaryMass
|
0.6 solar masses
|
|
gptkbp:secondarySpectralType
|
gptkb:white_dwarf
|
|
gptkbp:spectralType
|
G8IIIp
|
|
gptkbp:temperature
|
4865 K
|
|
gptkbp:variableStar
|
no
|
|
gptkbp:bfsParent
|
gptkb:Zeta_Cygni_B
|
|
gptkbp:bfsLayer
|
8
|
|
http://www.w3.org/2000/01/rdf-schema#label
|
Zeta Cygni system
|