|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:age
|
~8 million years
|
|
gptkbp:apparentMagnitude
|
1.6
|
|
gptkbp:BayerDesignation
|
gptkb:γ_Cas
|
|
gptkbp:catalogueNumber
|
gptkb:ADS_782_A
gptkb:BD+60_116
gptkb:FK5_17
gptkb:GC_1102
gptkb:HD_5394
gptkb:HIP_4427
gptkb:HR_264
gptkb:SAO_11482
gptkb:WDS_J00567+6043A
|
|
gptkbp:constellation
|
gptkb:Cassiopeia
|
|
gptkbp:declination
|
+60° 43′ 00″
|
|
gptkbp:diameter
|
~10 solar radii
|
|
gptkbp:discoveredBy
|
gptkb:John_Flamsteed
|
|
gptkbp:discoveredIn
|
17th century
|
|
gptkbp:distanceFromEarth
|
~550 light-years
|
|
gptkbp:emissionLines
|
strong H-alpha emission
|
|
gptkbp:FlamsteedDesignation
|
gptkb:27_Cassiopeiae
|
|
gptkbp:hasCompanion
|
yes
suspected white dwarf or subdwarf
|
|
gptkbp:hasDebrisDisk
|
yes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Gamma Cassiopeiae
|
|
gptkbp:isPrototypeOf
|
gptkb:Gamma_Cassiopeiae_variable_stars
|
|
gptkbp:luminosity
|
~34,000 times Sun
|
|
gptkbp:mass
|
~17 solar masses
|
|
gptkbp:metallicity
|
near solar
|
|
gptkbp:notableFor
|
Be star
X-ray emission
rapid rotation
prototype of Gamma Cassiopeiae variable stars
shell star
unusual variability
|
|
gptkbp:otherName
|
gptkb:γ_Cassiopeiae
|
|
gptkbp:parallax
|
5.66 mas
|
|
gptkbp:partOf
|
gptkb:asterism_'W'_of_Cassiopeia
gptkb:Cassiopeia_constellation
|
|
gptkbp:properMotionRA
|
+7.70 mas/yr
-9.13 mas/yr
|
|
gptkbp:rightAscension
|
00h 56m 42.5s
|
|
gptkbp:rotationPeriod
|
~375 km/s
|
|
gptkbp:spectralType
|
B0.5IVe
|
|
gptkbp:temperature
|
~25,000 K
|
|
gptkbp:variabilityRange
|
1.6 to 3.0 magnitude
|
|
gptkbp:variableStar
|
eruptive variable
|
|
gptkbp:XRayLuminosity
|
~10^33 erg/s
|
|
gptkbp:bfsParent
|
gptkb:Be_star
|
|
gptkbp:bfsLayer
|
6
|