HD 128621

URI: https://gptkb.org/entity/HD_128621

GPTKB entity

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
http://www.w3.org/2000/01/rdf-schema#label	HD 128621