The Black Hole of Cygnus X-1

URI: https://gptkb.org/entity/The_Black_Hole_of_Cygnus_X-1
GPTKB entity
Statements (31)
Predicate Object
gptkbp:instanceOf black hole
gptkbp:accretesMatterFrom gptkb:HDE_226868
gptkbp:alternativeName gptkb:HDE_226868_B
gptkb:V1357_Cygni
gptkbp:apparentMagnitude 8.95
gptkbp:declination +35° 12′ 06″
gptkbp:discoveredBy gptkb:Louise_Webster
gptkb:Paul_Murdin
gptkb:Tom_Bolton
gptkbp:discoveredIn 1971
gptkbp:distanceFromEarth about 7,200 light-years
gptkbp:eventHorizonConfirmed yes
gptkbp:hasCompanion gptkb:HDE_226868
gptkbp:hasJet yes
https://www.w3.org/2000/01/rdf-schema#label The Black Hole of Cygnus X-1
gptkbp:locatedIn gptkb:Cygnus_constellation
gptkbp:mass about 21 solar masses
gptkbp:notableFor first strong black hole candidate
gptkbp:orbitType 5.6 days
gptkbp:partOf gptkb:Cygnus_X-1_system
gptkbp:rightAscension 19h 58m 21.7s
gptkbp:rotationPeriod near maximal spin
gptkbp:spectralType gptkb:O9.7_Iab_(companion_star)
gptkbp:studiedBy gptkb:NASA
gptkb:Chandra_X-ray_Observatory
gptkb:Hubble_Space_Telescope
gptkb:ESA
gptkbp:type binary star system
gptkbp:XRaySource gptkb:Cygnus_X-1
gptkbp:bfsParent gptkb:Isaac_Asimov
gptkbp:bfsLayer 4