|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:age
|
about 70 million years
|
|
gptkbp:apparentMagnitude
|
1.98
|
|
gptkbp:declination
|
+89° 15′ 50.8″
|
|
gptkbp:diameter
|
about 37.5 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:William_Herschel_(system_discovery)
|
|
gptkbp:distanceFromEarth
|
about 433 light-years
|
|
gptkbp:hasCompanion
|
gptkb:Polaris_B
Polaris Ab
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Polaris Aa
|
|
gptkbp:isNorthStar
|
true
|
|
gptkbp:locatedIn
|
constellation Ursa Minor
|
|
gptkbp:luminosity
|
about 1,260 times solar luminosity
|
|
gptkbp:mass
|
about 5.4 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] ≈ 0.07
|
|
gptkbp:name
|
gptkb:Polaris
|
|
gptkbp:notableFor
|
being the current North Star
|
|
gptkbp:orbitalPeriodWithAb
|
about 29.6 years
|
|
gptkbp:otherDesignation
|
gptkb:HR_424
gptkb:SAO_308
gptkb:Alpha_Ursae_Minoris_Aa
gptkb:BD+88_8_Aa
gptkb:HD_8890_Aa
gptkb:HIP_11767_Aa
|
|
gptkbp:parallax
|
7.54 mas
|
|
gptkbp:partOf
|
gptkb:Polaris_triple_star_system
|
|
gptkbp:rightAscension
|
02h 31m 49.09s
|
|
gptkbp:spectralType
|
F7Ib
yellow supergiant
|
|
gptkbp:temperature
|
about 6,015 K
|
|
gptkbp:variableType
|
Classical Cepheid variable
|
|
gptkbp:bfsParent
|
gptkb:Nord
gptkb:The_North_Star
|
|
gptkbp:bfsLayer
|
5
|