|
gptkbp:instanceOf
|
gptkb:chemically_peculiar_star
gptkb:star
|
|
gptkbp:apparentMagnitude
|
3.66
|
|
gptkbp:catalogue
|
gptkb:Henry_Draper_Catalogue
|
|
gptkbp:catalogueNumber
|
gptkb:HD_137909
|
|
gptkbp:constellation
|
gptkb:Corona_Borealis
|
|
gptkbp:declination
|
+33° 18′ 53″
|
|
gptkbp:diameter
|
2.47
|
|
gptkbp:discoveredBy
|
gptkb:John_Flamsteed
|
|
gptkbp:distanceFromEarth
|
35
114
|
|
gptkbp:hasCompanion
|
no
|
|
gptkbp:luminosity
|
25
|
|
gptkbp:magneticFieldStrength
|
strong
|
|
gptkbp:mass
|
2.09
|
|
gptkbp:metallicity
|
0.00
|
|
gptkbp:notableFor
|
strong magnetic field
chemical peculiarities
|
|
gptkbp:otherName
|
gptkb:Beta_Coronae_Borealis
β Coronae Borealis
β CrB
|
|
gptkbp:parallax
|
28.98
0.18
|
|
gptkbp:rightAscension
|
15h 27m 49.8s
|
|
gptkbp:rotationPeriod
|
3.0
|
|
gptkbp:spectralType
|
A9SrEuCr
|
|
gptkbp:surfaceGravity
|
3.80
|
|
gptkbp:temperature
|
7,740
|
|
gptkbp:variabilityPeriod_days
|
18.4868
|
|
gptkbp:variableType
|
gptkb:Alpha2_Canum_Venaticorum_variable
|
|
gptkbp:bfsParent
|
gptkb:Alpha_Apodis
gptkb:Beta_Coronae_Borealis
|
|
gptkbp:bfsLayer
|
8
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HD 137909
|