HD 128621

URI: https://gptkb.org/entity/HD_128621
GPTKB entity
Statements (30)
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
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:HD_128621_(B)
gptkb:K1V_(Alpha_Centauri_B)
gptkbp:bfsLayer 7
https://www.w3.org/2000/01/rdf-schema#label HD 128621