Statements (23)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
astronomer
X-ray binary star system |
| gptkbp:apparentMagnitude |
13.5
|
| gptkbp:catalogueNumber |
gptkb:4U_1656+35
|
| gptkbp:discoveredBy |
gptkb:Uhuru_satellite
|
| gptkbp:discoveredIn |
1971
|
| gptkbp:distanceFromEarth |
21,000 light-years
|
| gptkbp:hasComponent |
gptkb:HZ_Herculis
white dwarf |
| https://www.w3.org/2000/01/rdf-schema#label |
Hercules X-1
|
| gptkbp:locatedIn |
constellation Hercules
|
| gptkbp:mainStar |
gptkb:HZ_Herculis
|
| gptkbp:massOfHZHerculis |
2.2 solar masses
|
| gptkbp:massOfNeutronStar |
1.4 solar masses
|
| gptkbp:notableFor |
first X-ray pulsar discovered
|
| gptkbp:orbitType |
1.7 days
|
| gptkbp:secondaryStar |
white dwarf
|
| gptkbp:spectralTypeOfHZHerculis |
gptkb:A7V
|
| gptkbp:variableType |
X-ray variable star
|
| gptkbp:XrayPulsationPeriod |
1.24 seconds
|
| gptkbp:bfsParent |
gptkb:X-ray_binaries
gptkb:binary_star_system |
| gptkbp:bfsLayer |
6
|