|
gptkbp:instanceOf
|
gptkb:star
binary star system
|
|
gptkbp:age
|
300 million years
|
|
gptkbp:apparentMagnitude
|
3.65
-1.20
|
|
gptkbp:arabicName
|
gptkb:Thuban
|
|
gptkbp:BayerDesignation
|
gptkb:Alpha_Draconis
|
|
gptkbp:catalogueNumber
|
gptkb:BD+65_879
gptkb:HD_123299
gptkb:HIP_68756
gptkb:HR_5291
gptkb:SAO_169474
gptkb:WDS_J14044+6422
gptkb:GC_18913
ADS 8813
FK5 497
|
|
gptkbp:component
|
α Draconis A
α Draconis B
|
|
gptkbp:constellationAbbreviation
|
gptkb:Dra
|
|
gptkbp:declination
|
+64° 22′ 33″
|
|
gptkbp:diameter
|
3.4 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:Friedrich_Wilhelm_Argelander
|
|
gptkbp:distanceFromEarth
|
303 light years
|
|
gptkbp:eclipticLatitude
|
+64° 22′ 33″
14h 04m 23.3s
|
|
gptkbp:epoch
|
gptkb:J2000
|
|
gptkbp:hasChineseName
|
紫微右垣一 (Zǐwēi Yòuyuán yī)
|
|
gptkbp:hasCompanion
|
α Draconis B
|
|
gptkbp:historicalSignificance
|
former pole star
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
α Draconis
|
|
gptkbp:locatedIn
|
constellation Draco
|
|
gptkbp:luminosity
|
120 solar luminosities
|
|
gptkbp:mass
|
2.8 solar masses
|
|
gptkbp:metallicity
|
-0.05 [Fe/H]
|
|
gptkbp:orbitType
|
51.4 days
|
|
gptkbp:otherName
|
gptkb:Thuban
|
|
gptkbp:parallax
|
10.76 mas
|
|
gptkbp:properMotionRA
|
-16.23 mas/yr
-21.11 mas/yr
|
|
gptkbp:radialVelocity
|
-13.3 km/s
|
|
gptkbp:rightAscension
|
14h 04m 23.3s
|
|
gptkbp:rotationPeriod
|
25 km/s
|
|
gptkbp:SIMBADID
|
alf+dra
|
|
gptkbp:spectralType
|
A0IV
|
|
gptkbp:temperature
|
9800 K
|
|
gptkbp:variableStar
|
no
|
|
gptkbp:visibleToNakedEye
|
yes
|
|
gptkbp:wasPoleStar
|
2700 BC
|
|
gptkbp:bfsParent
|
gptkb:Alpha_Draconis
|
|
gptkbp:bfsLayer
|
7
|