HIP 26311

E545063

HIP 26311 is the Hipparcos catalog designation for Alnilam, the bright blue supergiant star forming the central point of Orion’s Belt.

All labels observed (1)

Label Occurrences
HIP 26311 canonical 2

How this entity was disambiguated

Statements (47)

Predicate Object
instanceOf Hipparcos catalog star
star
absoluteMagnitudeV about −6.4
age_Myr about 5.7
alsoKnownAs Alnilam
Epsilon Orionis
apparentMagnitudeV 1.69
belongsToAssociation Orion OB1 association
belongsToSubgroup Orion OB1b subgroup
catalogIdentifier HIP 26311
color blue
constellation Orion
declination_J2000 −01° 12′ 07″
distanceFromEarth_ly about 2000
distanceFromEarth_pc about 600
effectiveTemperature_K about 27500
evolutionaryStage blue supergiant
futureEvolution likely core-collapse supernova
galacticPopulation thin disk
hasBayerDesignation ε Orionis
hasBDDesignation +−01° 969
hasFlamsteedDesignation 46 Orionis
hasHDDesignation HD 37128
hasHRDesignation HR 1852
hasProperMotion yes
hasSAODesignation SAO 132444
hasVariability yes
hemisphereVisibility both hemispheres
isBrightStar yes
isNakedEyeVisible yes
isPartOf Orion's Belt
linked to: Orion Belt region
isPrimaryComponentOf Orion's Belt asterism
linked to: Orion Belt region
luminosity_solar about 375000
luminosityClass Ia
mass_solar about 30
metallicity_FeH approximately solar
parallax_mas about 1.8
positionInAsterism central star of Orion's Belt
properMotionDec_masPerYr about 0.6
properMotionRA_masPerYr about 1.1
radialVelocity_kmPerSec about 27
radius_solar about 32
rankByBrightnessInOrion among the brightest stars in Orion
rightAscension_J2000 05h 36m 12.8s
spectralClass B0
spectralType B0Ia
variableType Alpha Cygni variable

How these facts were elicited

Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Alnilam catalogIdentifier HIP 26311