|
gptkbp:instanceOf
|
binary star system
black hole candidate
|
|
gptkbp:apparentMagnitude
|
8.95
|
|
gptkbp:catalogueNumber
|
gptkb:4U_1956+35
|
|
gptkbp:component
|
gptkb:HDE_226868
black hole
|
|
gptkbp:declination
|
+35° 12′ 06″
|
|
gptkbp:discoveredBy
|
gptkb:Charles_Thomas_Bolton
gptkb:Louise_Webster
gptkb:Paul_Murdin
|
|
gptkbp:discoveredIn
|
1964
|
|
gptkbp:distanceFromEarth
|
about 7,200 light-years
|
|
gptkbp:hasAccretionDisk
|
yes
|
|
gptkbp:hasCompanion
|
gptkb:HDE_226868
|
|
gptkbp:hasJet
|
yes
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Cygnus X-1
|
|
gptkbp:locatedIn
|
gptkb:constellation_Cygnus
|
|
gptkbp:massOfBlackHole
|
about 21 solar masses
|
|
gptkbp:massOfCompanionStar
|
about 40 solar masses
|
|
gptkbp:notableFor
|
evidence for stellar-mass black holes
first widely accepted black hole
|
|
gptkbp:orbitalSeparation
|
about 0.2 AU
|
|
gptkbp:orbitType
|
5.6 days
|
|
gptkbp:otherDesignation
|
gptkb:2MASS_J19581313+3512459
gptkb:4U_1956+35
gptkb:BD+34_3815
gptkb:GSC_03179-00959
gptkb:HIP_98298
gptkb:SAO_69181
gptkb:TYC_3179-959-1
gptkb:HDE_226868
gptkb:V1357_Cygni
|
|
gptkbp:parallax
|
0.0076 mas
0.5391 mas
|
|
gptkbp:partOf
|
gptkb:Milky_Way
|
|
gptkbp:radioSource
|
yes
|
|
gptkbp:rightAscension
|
19h 58m 21.7s
|
|
gptkbp:spectralType
|
gptkb:O9.7_Iab
|
|
gptkbp:studiedBy
|
gptkb:NASA
gptkb:Chandra_X-ray_Observatory
gptkb:Hubble_Space_Telescope
gptkb:ESA
|
|
gptkbp:variableStar
|
gptkb:V1357_Cygni
|
|
gptkbp:XraySource
|
yes
|
|
gptkbp:bfsParent
|
gptkb:binary_stars
gptkb:Cygnus_(constellation)
gptkb:The_Black_Hole_of_Cygnus_X-1
gptkb:black_hole
|
|
gptkbp:bfsLayer
|
5
|