Delta Cepheid

URI: https://gptkb.org/entity/Delta_Cepheid
GPTKB entity
Statements (35)
Predicate Object
gptkbp:instanceOf gptkb:star
variable star
gptkbp:apparentMagnitude 3.48
-3.47
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:eponymOf gptkb:Cepheid_variable_stars
gptkbp:hasCompanion gptkb:Delta_Cephei_B
https://www.w3.org/2000/01/rdf-schema#label Delta Cepheid
gptkbp:luminosity 2000 times solar luminosity
gptkbp:mass 4.5 solar masses
gptkbp:metallicity [Fe/H] = -0.07
gptkbp:notableFor prototype of Cepheid variable stars
gptkbp:otherName gptkb:BD+57_2569
gptkb:HD_213306
gptkb:HIP_110991
gptkb:HR_8571
gptkb:SAO_34508
δ Cephei
gptkbp:parallax 3.68 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:temperature 5,500–6,800 K
gptkbp:variableRange 3.48–4.37
gptkbp:variableType gptkb:Classical_Cepheid
gptkbp:bfsParent gptkb:Classical_Cepheid
gptkbp:bfsLayer 8