Delta Cephei

URI: https://gptkb.org/entity/Delta_Cephei

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:star gptkb: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
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
gptkbp:bfsLayer	6
https://www.w3.org/2000/01/rdf-schema#label	Delta Cephei