Cygnus OB2 #5

GPTKB entity

Statements (23)
Predicate Object
gptkbp:instanceOf binary star system
gptkbp:apparentMagnitude 9.06
gptkbp:component B-type star
O-type supergiant
possible Wolf-Rayet star
gptkbp:constellation gptkb:Cygnus
gptkbp:declination +41° 18′ 18″
gptkbp:discoveredBy gptkb:Stewart_Sharpless
gptkbp:discoveredIn 1953
gptkbp:distanceFromEarth 1,700 parsecs
gptkbp:epoch gptkb:J2000
https://www.w3.org/2000/01/rdf-schema#label Cygnus OB2 #5
gptkbp:locatedIn gptkb:Cygnus_OB2_association
gptkbp:luminosity over 1,000,000 times Sun
gptkbp:mass over 100 solar masses (system total)
gptkbp:otherName BD+40°4220
V729 Cyg
gptkbp:rightAscension 20h 32m 22.4s
gptkbp:spectralType O6.5-7 Ia
O7I
gptkbp:variableType binary star system
gptkbp:bfsParent gptkb:Cygnus_OB2
gptkbp:bfsLayer 7