|
gptkbp:instanceOf
|
gptkb:star
gptkb:red_supergiant
|
|
gptkbp:age
|
~10 million years
|
|
gptkbp:alsoKnownAs
|
gptkb:Deneb
|
|
gptkbp:apparentMagnitude
|
1.25
|
|
gptkbp:BayerDesignation
|
gptkb:α_Cygni
|
|
gptkbp:catalogueNumber
|
gptkb:BD+45_3250
gptkb:FK5_777
gptkb:HD_197345
gptkb:HIP_102098
gptkb:HR_7924
gptkb:SAO_49941
gptkb:2MASS_J20312599+4516491
gptkb:ADS_14107
gptkb:GC_28817
gptkb:GSC_03564-02886
gptkb:IRAS_20387+4504
gptkb:PLX_4372
gptkb:TYC_3564-2886-1
gptkb:WDS_J20313+4517A
AG+45 2107
PPM 41860
|
|
gptkbp:colorIndexB-V
|
+0.09
−0.19
|
|
gptkbp:constellation
|
gptkb:Cygnus
|
|
gptkbp:declination
|
+45° 16′ 49″
|
|
gptkbp:diameter
|
~203 solar radii
|
|
gptkbp:distanceFromEarth
|
~2,600 light years
|
|
gptkbp:hasNoKnownCompanions
|
true
|
|
gptkbp:isFarthestFirstMagnitudeStar
|
true
|
|
gptkbp:isPoleStarOfMars
|
true
|
|
gptkbp:luminosity
|
~196,000 times Sun
|
|
gptkbp:mass
|
~19 solar masses
|
|
gptkbp:metallicity
|
−0.02
|
|
gptkbp:parallax
|
1.01 mas
|
|
gptkbp:partOf
|
gptkb:Summer_Triangle
|
|
gptkbp:properMotionRA
|
1.02 mas/yr
0.48 mas/yr
|
|
gptkbp:radialVelocity
|
−4.5 km/s
|
|
gptkbp:rightAscension
|
20h 41m 25.9s
|
|
gptkbp:spectralType
|
A2Ia
|
|
gptkbp:temperature
|
8,525 K
|
|
gptkbp:variableStar
|
true
|
|
gptkbp:variableType
|
gptkb:Alpha_Cygni_variable
|
|
gptkbp:visibleToNakedEye
|
true
|
|
gptkbp:bfsParent
|
gptkb:Deneb
gptkb:Tau_Canis_Majoris
gptkb:Beta_Orionis
|
|
gptkbp:bfsLayer
|
7
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Alpha Cygni
|