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Delta Cephei
URI:
https://gptkb.org/entity/Delta_Cephei
GPTKB entity
Statements (35)
Predicate
Object
gptkbp:instanceOf
gptkb:star
variable star
gptkbp:apparentMagnitude
-3.47
3.5 to 4.4
gptkbp:catalogue
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue
gptkb:Bright_Star_Catalogue
gptkbp:constellation
gptkb:Cepheus
gptkbp:declination
+58° 24′ 54.7″
gptkbp:diameter
44.5 solar radii
gptkbp:discoveredBy
gptkb:John_Goodricke
gptkbp:discoveredIn
1784
gptkbp:distanceFromEarth
887 light years
gptkbp:hasCompanion
gptkb:Delta_Cephei_B
https://www.w3.org/2000/01/rdf-schema#label
Delta Cephei
gptkbp:isPrototypeOf
gptkb:Cepheid_variable_stars
gptkbp:locatedIn
gptkb:constellation_Cepheus
gptkbp:luminosity
2000 times Sun
gptkbp:mass
4.5 solar masses
gptkbp:metallicity
-0.07
gptkbp:otherDesignation
gptkb:BD+57_2569
gptkb:HD_213306
gptkb:HIP_110991
gptkb:HR_8571
gptkbp:parallax
3.66 mas
gptkbp:period
5.366 days
gptkbp:properMotionRA
16.41 mas/yr
3.55 mas/yr
gptkbp:radialVelocity
-16.8 km/s
gptkbp:rightAscension
22h 29m 10.27s
gptkbp:spectralType
F5Ib-G1Ib
gptkbp:variableType
gptkb:Classical_Cepheid
gptkbp:bfsParent
gptkb:Yellow_supergiant
gptkb:Cepheus
gptkbp:bfsLayer
6