Alpha Geminorum

GPTKB entity

Statements (59)
Predicate Object
gptkbp:instanceOf gptkb:star
gptkbp:age 200 million years
gptkbp:alsoKnownAs gptkb:Castor
gptkbp:apparentMagnitude 0.58
1.58
gptkbp:BayerDesignation gptkb:α_Geminorum
gptkbp:brightestStar gptkb:Pollux
gptkbp:catalogueNumber gptkb:ADS_6175
gptkb:BD+32_1582
gptkb:HD_60179
gptkb:HIP_36850
gptkb:HR_2891
gptkb:SAO_60198
gptkb:WDS_J07346+3153
gptkbp:colorIndexB-V +0.00
-0.01
gptkbp:component gptkb:Castor_A
gptkb:Castor_B
gptkb:Castor_C
gptkbp:constellation gptkb:Gemini
gptkbp:declination +31° 53′ 18″
gptkbp:discoveredBy gptkb:James_Pound
gptkbp:discoveredIn 1718
gptkbp:distanceFromEarth 51 light years
gptkbp:eclipticLatitude +6.5°
112.2°
gptkbp:galacticLatitude +32.1°
186.4°
gptkbp:hasExoplanet no
https://www.w3.org/2000/01/rdf-schema#label Alpha Geminorum
gptkbp:luminosity 0.06 solar luminosities (Castor C)
14 solar luminosities (Castor B)
52 solar luminosities (Castor A)
gptkbp:mass 0.6 solar masses (Castor C)
1.7 solar masses (Castor B)
2.15 solar masses (Castor A)
gptkbp:metallicity -0.07 [Fe/H]
gptkbp:mythologicalRole one of the twins in Gemini
gptkbp:name gptkb:Castor
gptkbp:orbitType 0.8 days (Castor C inner pair)
2.9 days (Castor B inner pair)
467 years (A-B pair)
9.2 days (Castor A inner pair)
gptkbp:parallax 66.76 mas
gptkbp:radialVelocity +1.3 km/s
gptkbp:rating 6
gptkbp:rightAscension 07h 34m 36.0s
gptkbp:rotationPeriod 10 km/s (Castor C)
18 km/s (Castor A)
33 km/s (Castor B)
gptkbp:separationFromPollux 4.5°
gptkbp:spectralType A1V
A2Vm
M1V
M2V
gptkbp:variableType none
gptkbp:visibleToNakedEye yes
gptkbp:bfsParent gptkb:Castor
gptkbp:bfsLayer 5