|
gptkbp:instanceOf
|
gptkb:star
binary star system
|
|
gptkbp:age
|
65 million years
|
|
gptkbp:apparentMagnitude
|
2.79
|
|
gptkbp:BayerDesignation
|
gptkb:β_Draconis
|
|
gptkbp:catalogueNumber
|
gptkb:ADS_10418
gptkb:FK5_653
gptkb:GC_23810
gptkb:HD_159181
gptkb:HR_6536
gptkb:SAO_30213
gptkb:WDS_J17305+5218
gptkb:HIP_85258
BD+52 1941
|
|
gptkbp:colorIndexB-V
|
+0.98
+1.15
|
|
gptkbp:constellation
|
gptkb:Draco
|
|
gptkbp:declination
|
+52° 18′ 05.2″
|
|
gptkbp:diameter
|
40 solar radii
|
|
gptkbp:discoveredBy
|
known since antiquity
|
|
gptkbp:distanceFromEarth
|
362 light years
|
|
gptkbp:eclipticLatitude
|
+52.3°
262.6°
|
|
gptkbp:evolutionaryStage
|
bright giant
|
|
gptkbp:FlamsteedDesignation
|
gptkb:21_Draconis
|
|
gptkbp:galacticLatitude
|
+38.6°
80.1°
|
|
gptkbp:hasCompanion
|
yes
faint, unresolved
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
β Draconis
|
|
gptkbp:IAUApprovedName
|
gptkb:Rastaban
|
|
gptkbp:luminosity
|
950 solar luminosities
|
|
gptkbp:mass
|
6 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = -0.02
|
|
gptkbp:nameOrigin
|
Arabic: 'Rās al-Thuʿbān' (Head of the Serpent)
|
|
gptkbp:otherName
|
gptkb:Rastaban
gptkb:Beta_Draconis
|
|
gptkbp:parallax
|
0.15 mas
9.01 mas
|
|
gptkbp:partOf
|
gptkb:Draco_constellation
|
|
gptkbp:properMotionRA
|
-10.16 mas/yr
-9.36 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:visibleToNakedEye
|
yes
|
|
gptkbp:bfsParent
|
gptkb:Metuenda_Corolla_Draconis
|
|
gptkbp:bfsLayer
|
5
|