Alpha Centauri

URI: https://gptkb.org/entity/Alpha_Centauri
GPTKB entity
AI-created image of Alpha Centauri
AI-created image
Statements (33)
Predicate Object
gptkbp:instanceOf gptkb:star
gptkbp:age 4.85 billion years
gptkbp:alsoKnownAs gptkb:Rigil_Kentaurus
gptkbp:angularSeparation up to 22 arcseconds (A and B)
gptkbp:apparentMagnitude -0.27
gptkbp:brightestStar constellation Centaurus
gptkbp:catalogueNumber gptkb:Gliese_559
gptkb:HD_128620C_(Proxima_Centauri)
gptkb:HD_128620_(A)
gptkb:HD_128621_(B)
gptkbp:component gptkb:Proxima_Centauri
gptkb:Alpha_Centauri_A
gptkb:Alpha_Centauri_B
gptkbp:declination -60° 50′ 02.3737″
gptkbp:discoveredBy unknown (known since antiquity)
gptkbp:distanceFromEarth 4.37 light years
gptkbp:hasExoplanet gptkb:Proxima_Centauri_b
gptkbp:hasViewOf gptkb:Southern_Hemisphere
gptkbp:locatedIn constellation Centaurus
gptkbp:mass 2.18 solar masses (combined)
gptkbp:metallicity 0.22 [Fe/H] (Alpha Centauri A)
gptkbp:nearestStarSystemToSun true
gptkbp:orbitType 79.91 years (A and B)
gptkbp:parallax 747.17 mas
gptkbp:partOf gptkb:Milky_Way_galaxy
gptkbp:properMotionRA 3679 mas/yr
gptkbp:radialVelocity -22.4 km/s
gptkbp:rightAscension 14h 39m 36.49400s
gptkbp:spectralType G2V + K1V + M5.5Ve
gptkbp:bfsParent gptkb:Breakthrough_Starshot
gptkb:Stars
gptkbp:bfsLayer 5
https://www.w3.org/2000/01/rdf-schema#label Alpha Centauri