|
gptkbp:instanceOf
|
gptkb:star
gptkb:red_supergiant
|
|
gptkbp:apparentMagnitude
|
2.79
-2.45
|
|
gptkbp:BayerDesignation
|
gptkb:β_Draconis
|
|
gptkbp:catalogueNumber
|
gptkb:BD+52_1945
gptkb:HD_159181
gptkb:HIP_85267
gptkb:SAO_30213
gptkb:HR_6705
|
|
gptkbp:colorIndexB-V
|
+1.01
+0.81
|
|
gptkbp:constellation
|
gptkb:Draco
|
|
gptkbp:declination
|
+52° 18′ 05.2″
|
|
gptkbp:diameter
|
40 solar radii
|
|
gptkbp:discoveredBy
|
known since antiquity
|
|
gptkbp:distanceFromEarth
|
380 light years
|
|
gptkbp:eponymOf
|
Rastaban (Arabic: 'head of the serpent')
|
|
gptkbp:FlamsteedDesignation
|
gptkb:21_Draconis
|
|
gptkbp:hasCompanion
|
suspected, not confirmed
|
|
gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
|
|
gptkbp:luminosity
|
950 solar luminosities
|
|
gptkbp:mass
|
6 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -0.02
|
|
gptkbp:notableFor
|
one of the brightest stars in Draco
|
|
gptkbp:otherName
|
gptkb:Rastaban
|
|
gptkbp:parallax
|
8.59 mas
|
|
gptkbp:properMotionRA
|
-5.77 mas/yr
-6.00 mas/yr
|
|
gptkbp:radialVelocity
|
-21.6 km/s
|
|
gptkbp:rightAscension
|
17h 30m 25.96s
|
|
gptkbp:spectralType
|
G2Ib-IIa
|
|
gptkbp:temperature
|
5,160 K
|
|
gptkbp:variableStar
|
no
|
|
gptkbp:bfsParent
|
gptkb:Rastaban
|
|
gptkbp:bfsLayer
|
7
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Beta Draconis
|