Statements (15)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:apparentMagnitude |
8.81
|
| gptkbp:declination |
-25° 24′ 25″
|
| gptkbp:discoveredBy |
1999 (as X-ray transient)
|
| gptkbp:distanceFromEarth |
~6,200 light-years
|
| gptkbp:hasCompanion |
black hole
|
| https://www.w3.org/2000/01/rdf-schema#label |
CD-21 16981
|
| gptkbp:locatedIn |
gptkb:constellation_Sagittarius
|
| gptkbp:otherDesignation |
HD 315984
V4641 Sgr |
| gptkbp:rightAscension |
18h 19m 21.6s
|
| gptkbp:spectralType |
B9III
|
| gptkbp:variableType |
binary star system
|
| gptkbp:bfsParent |
gptkb:HD_204317
|
| gptkbp:bfsLayer |
8
|