Alpha Hydrae

URI: https://gptkb.org/entity/Alpha_Hydrae
GPTKB entity
Statements (38)
Predicate Object
gptkbp:instanceOf gptkb:star
gptkb:red_supergiant
gptkbp:age 420 million years
gptkbp:apparentMagnitude 1.98
gptkbp:BayerDesignation gptkb:Alpha_Hydrae
gptkbp:catalogue gptkb:2MASS_J09273523-0839317
gptkb:FK5_352
gptkb:GC_13013
gptkb:HD_81797
gptkb:HIP_46390
gptkb:SAO_136871
gptkb:WDS_J09277-0839A
BD-08 2685
CD-08 2736
HR 3748
gptkbp:colorIndexB-V +1.44
+1.68
gptkbp:constellation gptkb:Hydra
gptkbp:declination -08° 39′ 31.8″
gptkbp:diameter 50 solar radii
gptkbp:distanceFromEarth 177 light years
gptkbp:luminosity 400 solar luminosities
gptkbp:mass 3 solar masses
gptkbp:metallicity -0.03
gptkbp:otherName gptkb:Alphard
Alpha Hya
gptkbp:parallax 18.40 mas
gptkbp:properMotionRA +33.46 mas/yr
-18.10 mas/yr
gptkbp:radialVelocity +55.5 km/s
gptkbp:rightAscension 09h 27m 35.24s
gptkbp:singleStar yes
gptkbp:spectralType K3II-III
gptkbp:temperature 4,000 K
gptkbp:variableStar no
gptkbp:bfsParent gptkb:HD_60178
gptkbp:bfsLayer 7
https://www.w3.org/2000/01/rdf-schema#label Alpha Hydrae