Cygnus X-1 (black hole)

URI: https://gptkb.org/entity/Cygnus_X-1_(black_hole)

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:black_hole
gptkbp:accretionDisk	yes
gptkbp:apparentMagnitude	8.95
gptkbp:category	gptkb:high-mass_X-ray_binary gptkb:microquasar gptkb:binary_star_system
gptkbp:declination	+35° 12′ 06″
gptkbp:discoveredBy	gptkb:Tom_Bolton
gptkbp:discoveredIn	1971
gptkbp:distanceFromEarth	about 6,070 light-years
gptkbp:firstBlackHoleCandidate	yes
gptkbp:hasCompanion	gptkb:HDE_226868
gptkbp:hasEventHorizon	yes
gptkbp:hasJet	yes
gptkbp:hostedBy	gptkb:Milky_Way
gptkbp:locatedIn	gptkb:constellation_Cygnus
gptkbp:mass	about 21 solar masses
gptkbp:notableFor	first strong black hole candidate
gptkbp:orbitType	5.6 days
gptkbp:partOf	binary system
gptkbp:publishedIn	gptkb:Astrophysical_Journal gptkb:Nature
gptkbp:radioSource	yes
gptkbp:rightAscension	19h 58m 21.7s
gptkbp:spectralType	gptkb:O9.7_Iab
gptkbp:spin	near maximal
gptkbp:studiedBy	gptkb:NASA gptkb:Chandra_X-ray_Observatory gptkb:Hubble_Space_Telescope gptkb:ESA
gptkbp:type	gptkb:black_hole
gptkbp:X-raySource	yes
gptkbp:bfsParent	gptkb:HDE_226868
gptkbp:bfsLayer	7
https://www.w3.org/2000/01/rdf-schema#label	Cygnus X-1 (black hole)