Statements (19)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:apparentMagnitude |
14.8
|
| gptkbp:component |
gptkb:Cygnus_X-1
|
| gptkbp:constellation |
gptkb:Cygnus
|
| gptkbp:declination |
+35° 12′ 06″
|
| gptkbp:diameter |
~17 solar radii
|
| gptkbp:discoveredBy |
1964
|
| gptkbp:distanceFromEarth |
~7,200 light-years
|
| gptkbp:hasCompanion |
gptkb:Cygnus_X-1_(black_hole)
|
| gptkbp:luminosity |
~300,000 times Sun
|
| gptkbp:mass |
~20 solar masses
|
| gptkbp:orbitType |
5.6 days
|
| gptkbp:rightAscension |
19h 58m 21.7s
|
| gptkbp:spectralType |
gptkb:O9.7_Iab
O-type supergiant |
| gptkbp:temperature |
~30,000 K
|
| gptkbp:bfsParent |
gptkb:HDE_226868_B
|
| gptkbp:bfsLayer |
7
|
| https://www.w3.org/2000/01/rdf-schema#label |
Cygnus X-1 B
|