|
gptkbp:instanceOf
|
gptkb:star
Be star
variable star
|
|
gptkbp:apparentMagnitude
|
2.15
|
|
gptkbp:catalogue
|
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue
gptkb:Bright_Star_Catalogue
|
|
gptkbp:constellation
|
gptkb:Cassiopeia
|
|
gptkbp:declination
|
+60° 43′ 00″
|
|
gptkbp:diameter
|
~10 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:Frederick_William_Herschel
|
|
gptkbp:discoveredIn
|
1780
|
|
gptkbp:distanceFromEarth
|
~550 light years
|
|
gptkbp:emissionLines
|
strong H-alpha emission
|
|
gptkbp:hasCompanion
|
yes
suspected white dwarf or neutron star
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
γ Cas
|
|
gptkbp:locatedIn
|
gptkb:Cassiopeia
|
|
gptkbp:luminosity
|
~34,000 times Sun
|
|
gptkbp:mass
|
~17 solar masses
|
|
gptkbp:notableFor
|
prototype of Gamma Cassiopeiae variable stars
|
|
gptkbp:otherName
|
gptkb:Gamma_Cassiopeiae
gptkb:27_Cassiopeiae
gptkb:HD_5394
gptkb:HIP_4427
gptkb:HR_264
|
|
gptkbp:rightAscension
|
00h 56m 42.5s
|
|
gptkbp:rotationPeriod
|
~400 km/s
|
|
gptkbp:spectralType
|
B0.5IVe
|
|
gptkbp:temperature
|
~25,000 K
|
|
gptkbp:variabilityPeriod
|
~1.21 days
|
|
gptkbp:variableType
|
gptkb:Gamma_Cassiopeiae_variable
|
|
gptkbp:bfsParent
|
gptkb:Gamma_Cassiopeiae
|
|
gptkbp:bfsLayer
|
7
|