|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:alsoKnownAs
|
gptkb:Alpha_Centauri_B
|
|
gptkbp:apparentMagnitude
|
1.33
6.03
|
|
gptkbp:catalogueNumber
|
gptkb:Gliese_559_B
gptkb:HD_128621
gptkb:HIP_71681
gptkb:HR_5460
|
|
gptkbp:constellation
|
gptkb:Centaurus
|
|
gptkbp:containsPlanet
|
no confirmed planets
|
|
gptkbp:declination
|
-60° 50′ 02″
|
|
gptkbp:diameter
|
0.863 solar radii
|
|
gptkbp:discoveredIn
|
1839
|
|
gptkbp:distanceFromEarth
|
4.37 light years
|
|
gptkbp:eccentricity
|
0.5179
|
|
gptkbp:hasCompanion
|
gptkb:HD_128620_(Alpha_Centauri_A)
Proxima Centauri (Alpha Centauri C)
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HD 128621 (B)
|
|
gptkbp:luminosity
|
0.445 solar luminosities
|
|
gptkbp:mass
|
0.907 solar masses
|
|
gptkbp:metallicity
|
[Fe/H] = +0.23
|
|
gptkbp:orbitType
|
79.91 years
|
|
gptkbp:parallax
|
747.17 mas
|
|
gptkbp:partOf
|
gptkb:Alpha_Centauri_system
|
|
gptkbp:properMotionRA
|
+481.84 mas/yr
-3678.19 mas/yr
|
|
gptkbp:rightAscension
|
14h 39m 36.5s
|
|
gptkbp:spectralType
|
K1V
|
|
gptkbp:temperature
|
5230 K
|
|
gptkbp:bfsParent
|
gptkb:Alpha_Centauri
gptkb:Alpha_Centauri_triple_star_system
|
|
gptkbp:bfsLayer
|
6
|