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gptkbp:instanceOf
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gptkb:star
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gptkbp:alsoKnownAs
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gptkb:Nord
gptkb:Polaris
|
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gptkbp:apparentMagnitude
|
1.98
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gptkbp:catalogueNumber
|
gptkb:HR_424
gptkb:Alpha_Ursae_Minoris
gptkb:BD+88_8
gptkb:HD_8890
gptkb:HIP_11767
gptkb:SAO_308
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gptkbp:constellationAbbreviation
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gptkb:UMi
|
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gptkbp:containsPlanet
|
yes
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|
gptkbp:culturalSignificance
|
important in navigation and folklore
|
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gptkbp:declination
|
+89° 15′ 50.8″
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gptkbp:diameter
|
about 37.5 solar radii
|
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gptkbp:discoveredBy
|
known since antiquity
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gptkbp:distanceFromEarth
|
about 433 light years
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gptkbp:epoch
|
gptkb:J2000
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gptkbp:evolutionaryStage
|
supergiant
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gptkbp:firstCepheidVariableDiscovered
|
no
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gptkbp:hasCompanion
|
gptkb:Polaris_B
Polaris Ab
|
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gptkbp:hasExoplanet
|
no known exoplanets
|
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gptkbp:hasOpticalCompanion
|
gptkb:Polaris_B
|
|
gptkbp:hasSpectroscopicCompanion
|
Polaris Ab
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gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Polar Star
|
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gptkbp:isCepheidVariable
|
yes
|
|
gptkbp:isNorthCelestialPoleStar
|
yes
|
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gptkbp:isSupergiant
|
yes
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gptkbp:locatedIn
|
constellation Ursa Minor
|
|
gptkbp:luminosity
|
about 2,500 times Sun
|
|
gptkbp:mass
|
about 5.4 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -0.07
|
|
gptkbp:nextClosestPoleStar
|
gptkb:Gamma_Cephei_(in_about_3,000_years)
|
|
gptkbp:notableFor
|
closest bright star to the north celestial pole
|
|
gptkbp:parallax
|
7.54 mas
|
|
gptkbp:precessionalMovement
|
will not always be the pole star
|
|
gptkbp:properMotionRA
|
44.22 mas/yr in RA, -11.74 mas/yr in Dec
|
|
gptkbp:radialVelocity
|
-16.6 km/s
|
|
gptkbp:rightAscension
|
02h 31m 49.09s
|
|
gptkbp:spectralType
|
F7:Ib-II
|
|
gptkbp:temperature
|
6015 K
|
|
gptkbp:usedFor
|
gptkb:navigation
|
|
gptkbp:variableType
|
variable star
|
|
gptkbp:visibleMagnitudeRange
|
1.86 to 2.13
|
|
gptkbp:visibleToNakedEye
|
yes
|
|
gptkbp:bfsParent
|
gptkb:Free_Russian_Press
|
|
gptkbp:bfsLayer
|
6
|