Delta Cygni

URI: https://gptkb.org/entity/Delta_Cygni
GPTKB entity
Statements (36)
Predicate Object
gptkbp:instanceOf gptkb:star
gptkbp:age 200 million years
gptkbp:apparentMagnitude 2.87
gptkbp:binarySystem true
gptkbp:colorIndexB-V -0.23
-0.08
gptkbp:component gptkb:Delta_Cygni_A
gptkb:Delta_Cygni_B
gptkb:Delta_Cygni_C
gptkbp:constellation gptkb:Cygnus
gptkbp:declination +45° 07′ 50.77″
gptkbp:diameter 2.4 solar radii
gptkbp:discoveredBy gptkb:William_Herschel
gptkbp:discoveredIn 1779
gptkbp:distanceFromEarth 165 light years
gptkbp:epoch gptkb:J2000
https://www.w3.org/2000/01/rdf-schema#label Delta Cygni
gptkbp:luminosity 155 solar luminosities
gptkbp:mass 3.17 solar masses
gptkbp:metallicity -0.10 [Fe/H]
gptkbp:otherDesignation gptkb:δ_Cygni
gptkb:HD_195810
gptkb:HIP_101067
gptkb:HR_7852
gptkbp:parallax 19.77 mas
gptkbp:partOf gptkb:Summer_Triangle_(asterism)
gptkbp:properMotionRA -6.16 mas/yr
-67.57 mas/yr
gptkbp:radialVelocity -21.6 km/s
gptkbp:rightAscension 19h 44m 58.478s
gptkbp:rotationPeriod 135 km/s
gptkbp:spectralType B9.5V
gptkbp:temperature 10,400 K
gptkbp:variableType suspected variable
gptkbp:bfsParent gptkb:Cygnus_(constellation)
gptkbp:bfsLayer 5