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gptkbp:instanceOf
|
gptkb:star
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gptkbp:age
|
~455 million years
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gptkbp:alsoKnownAs
|
gptkb:Vega
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gptkbp:apparentMagnitude
|
0.03
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gptkbp:catalogueNumber
|
gptkb:SAO_067174
gptkb:BD+38_3238
gptkb:Gliese_721
gptkb:HD_172167
gptkb:HIP_91262
gptkb:HR_7001
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gptkbp:constellation
|
gptkb:Lyra
|
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gptkbp:declination
|
+38° 47′ 1″
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gptkbp:diameter
|
2.3 solar radii
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gptkbp:discoveredBy
|
ancient civilizations
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gptkbp:distanceFromEarth
|
25 light-years
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gptkbp:eclipticLatitude
|
61.5°
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gptkbp:hasDebrisDisk
|
yes
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gptkbp:hasExoplanet
|
no confirmed exoplanets
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gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
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|
https://www.w3.org/2000/01/rdf-schema#label
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Alpha Lyrae
|
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gptkbp:isPoleStar
|
was pole star around 12,000 BC
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gptkbp:luminosity
|
40.12 times solar
|
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gptkbp:mass
|
2.1 solar masses
|
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gptkbp:metallicity
|
[Fe/H] = -0.5
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gptkbp:notableFor
|
one of the brightest stars in the night sky
reference point for magnitude scale
standard star for photometric system
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gptkbp:parallax
|
130.23 mas
|
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gptkbp:partOf
|
gptkb:Summer_Triangle
|
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gptkbp:properMotionRA
|
201.03 mas/yr
286.23 mas/yr
|
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gptkbp:radialVelocity
|
-13.9 km/s
|
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gptkbp:rightAscension
|
18h 36m 56.3s
|
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gptkbp:rotationPeriod
|
274 km/s
|
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gptkbp:spectralType
|
A0V
|
|
gptkbp:temperature
|
9600 K
|
|
gptkbp:variableType
|
gptkb:Delta_Scuti
|
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gptkbp:willBePoleStar
|
will be pole star again around 13,727 AD
|
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gptkbp:bfsParent
|
gptkb:HR_6536
gptkb:Vega
|
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gptkbp:bfsLayer
|
6
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