Statements (29)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
gptkb:star
|
| gptkbp:age |
5.3 billion years
|
| gptkbp:alsoKnownAs |
gptkb:Alpha_Centauri_B
|
| gptkbp:apparentMagnitude |
1.35
|
| gptkbp:catalogue |
gptkb:Henry_Draper_Catalogue
|
| gptkbp:catalogueNumber |
gptkb:HD_128621
|
| gptkbp:constellation |
gptkb:Centaurus
|
| gptkbp:declination |
-60° 50′ 02.3″
|
| gptkbp:diameter |
0.863 solar radii
|
| gptkbp:discoveredBy |
gptkb:John_Herschel
|
| gptkbp:discoveredIn |
1839
|
| gptkbp:distanceFromEarth |
4.37 light years
|
| gptkbp:hasCompanion |
gptkb:Proxima_Centauri
gptkb:Alpha_Centauri_A |
| https://www.w3.org/2000/01/rdf-schema#label |
HD 128621
|
| gptkbp:luminosity |
0.445 solar luminosities
|
| gptkbp:mass |
0.907 solar masses
|
| gptkbp:metallicity |
+0.26
|
| gptkbp:parallax |
747.17 mas
|
| gptkbp:partOf |
gptkb:Alpha_Centauri_system
|
| gptkbp:properMotionRA |
+481.84 mas/yr
-3678.19 mas/yr |
| gptkbp:radialVelocity |
-22.4 km/s
|
| gptkbp:rightAscension |
14h 39m 36.5s
|
| gptkbp:spectralType |
K1V
|
| gptkbp:temperature |
5,240 K
|
| gptkbp:bfsParent |
gptkb:Alpha_Centauri_B
gptkb:K1V_(Alpha_Centauri_B) |
| gptkbp:bfsLayer |
6
|