|
gptkbp:instanceOf
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gptkb:star
astronomer
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|
gptkbp:age
|
~4 million years
|
|
gptkbp:apparentMagnitude
|
5.05
-6.3
|
|
gptkbp:catalogue
|
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue
gptkb:Bright_Star_Catalogue
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gptkbp:catalogueNumber
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gptkb:FK5_865
gptkb:GC_30938
gptkb:SAO_34508
gptkb:HD_210839
2MASS J22025836+5854306
ADS 15527 A
BD+58 2524
GSC 03999-02213
HIP 109556
HR 8469
|
|
gptkbp:colorIndexB-V
|
+0.03
-0.95
|
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gptkbp:constellation
|
gptkb:Cepheus
|
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gptkbp:declination
|
+58° 54′ 30″
|
|
gptkbp:diameter
|
~18 solar radii
|
|
gptkbp:discoveredBy
|
known since antiquity as Lambda Cephei
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gptkbp:distanceFromEarth
|
~1,980 light years
|
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gptkbp:epoch
|
gptkb:J2000
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HD 210839
|
|
gptkbp:luminosity
|
~630,000 times Sun
|
|
gptkbp:mass
|
~45 solar masses
|
|
gptkbp:metallicity
|
~solar
|
|
gptkbp:notableFor
|
emission-line star
variable wind features
one of the hottest and most massive stars visible to the naked eye
|
|
gptkbp:otherName
|
gptkb:Lambda_Cephei
|
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gptkbp:parallax
|
1.65 mas
|
|
gptkbp:properMotionRA
|
-2.13 mas/yr
-2.26 mas/yr
|
|
gptkbp:radialVelocity
|
-75.5 km/s
|
|
gptkbp:rightAscension
|
22h 02m 58.3s
|
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gptkbp:rotationPeriod
|
210 km/s
|
|
gptkbp:runawayStar
|
yes
|
|
gptkbp:spectralType
|
O6.5I(n)fp
|
|
gptkbp:temperature
|
36,000 K
|
|
gptkbp:variableStar
|
yes
|
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gptkbp:bfsParent
|
gptkb:HR_8461
|
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gptkbp:bfsLayer
|
8
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