|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:alsoKnownAs
|
gptkb:Nord
gptkb:Alpha_Ursae_Minoris
gptkb:Pole_Star
|
|
gptkbp:apparentMagnitude
|
1.98
-3.64
|
|
gptkbp:catalogue
|
gptkb:HR_424
gptkb:BD+88_8
gptkb:HD_8890
gptkb:HIP_11767
gptkb:SAO_308
gptkb:WDS_J02318+8915
gptkb:ADS_1477
Gliese 15.1
|
|
gptkbp:component
|
gptkb:Polaris_B
gptkb:Polaris_Aa
Polaris Ab
|
|
gptkbp:constellation
|
gptkb:Ursa_Minor
|
|
gptkbp:containsPlanet
|
true
|
|
gptkbp:declination
|
+89° 15′ 50.8″
|
|
gptkbp:diameter
|
37.5 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:William_Herschel
|
|
gptkbp:discoveredIn
|
1780
|
|
gptkbp:distanceFromEarth
|
433 light years
|
|
gptkbp:epoch
|
gptkb:J2000
|
|
gptkbp:galacticLatitude
|
123.29°
26.46°
|
|
gptkbp:hasCompanion
|
gptkb:Polaris_B
Polaris Ab
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
POLARIS
|
|
gptkbp:isCepheidStandard
|
true
|
|
gptkbp:isClosestBrightStarToCelestialNorthPole
|
true
|
|
gptkbp:isEndStarOfAsterism
|
Little Dipper's handle
|
|
gptkbp:isNotVisibleFromSouthernHemisphere
|
true
|
|
gptkbp:isPartOfAsterism
|
gptkb:Little_Dipper
|
|
gptkbp:isVisibleFromNorthernHemisphere
|
true
|
|
gptkbp:luminosity
|
2,500 times Sun
|
|
gptkbp:mass
|
5.4 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = 0.07
|
|
gptkbp:orbitalPeriodOfAaAb
|
29.6 years
|
|
gptkbp:orbitalPeriodOfAaB
|
~50,000 years
|
|
gptkbp:parallax
|
7.54 mas
|
|
gptkbp:Polaris_Aa
|
supergiant
|
|
gptkbp:Polaris_Ab
|
stellar classification
|
|
gptkbp:Polaris_B
|
stellar classification
|
|
gptkbp:precessionalMovement
|
will be closest to pole around 2100 AD
|
|
gptkbp:properMotionRA
|
-11.74 mas/yr
44.22 mas/yr
|
|
gptkbp:rightAscension
|
02h 31m 49.09s
|
|
gptkbp:spectralType
|
F7:Ib
|
|
gptkbp:temperature
|
6015 K
|
|
gptkbp:usedFor
|
gptkb:navigation
celestial pole marker
|
|
gptkbp:variabilityPeriod
|
3.97 days
|
|
gptkbp:variableType
|
variable star
|
|
gptkbp:bfsParent
|
gptkb:Polaris_DEX
gptkb:Northwestern_Air
|
|
gptkbp:bfsLayer
|
7
|