Statements (30)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:apparentMagnitude |
9.06
|
| gptkbp:component |
gptkb:Cygnus_OB2
Cygnus OB2 #8Aa Cygnus OB2 #8Ab |
| gptkbp:declination |
+41° 18′ 50″
|
| gptkbp:discoveredBy |
N. R. Walborn
|
| gptkbp:discoveredIn |
1973
|
| gptkbp:distanceFromEarth |
1,400 parsecs
4,600 light-years |
| https://www.w3.org/2000/01/rdf-schema#label |
Cygnus OB2 #8A
|
| gptkbp:locatedIn |
gptkb:Cygnus_constellation
gptkb:Cygnus_OB2_association |
| gptkbp:luminosity |
660,000 times Sun (secondary)
870,000 times Sun (primary) |
| gptkbp:mass |
37 solar masses (secondary)
44 solar masses (primary) |
| gptkbp:notableFor |
massive binary system
strong X-ray emission |
| gptkbp:numberOfConstituents |
2
|
| gptkbp:orbitType |
21.9 days
|
| gptkbp:otherDesignation |
2MASS J20331510+4118500
BD+40°4220 GSC 03161-00808 |
| gptkbp:rightAscension |
20h 33m 15.1s
|
| gptkbp:spectralType |
O5.5III(f)
O6If |
| gptkbp:variableType |
binary star system
|
| gptkbp:bfsParent |
gptkb:Cygnus_OB2
|
| gptkbp:bfsLayer |
7
|