Alnilam

E127427

Alnilam is a bright blue supergiant star that forms the central and most luminous point of Orion’s Belt in the constellation Orion.

All labels observed (1)

Label Occurrences
Alnilam canonical 2

How this entity was disambiguated

Statements (48)

Predicate Object
instanceOf astronomical object
blue supergiant star
star
supergiant star
age_millionYears about 5
apparentMagnitude 1.69
bayerDesignation Epsilon Orionis
belongsTo Milky Way
bestSeenInMonth January
catalogIdentifier HD 37128
HIP 26311
HR 1903
SAO 132444
color blue
constellation Orion
declination −01° 12′ 07″
distanceFromEarth_ly about 2000
distanceFromEarth_pc about 600
effectiveTemperature_K about 27500
evolutionaryStage post-main-sequence
flamsteedDesignation 46 Orionis
galacticPopulation thin disk
hasCompanions possible faint optical companions
hemisphereVisibility both northern and southern hemispheres
isKeyFeatureOf Orion constellation
surface form: Orion constellation pattern
isMostLuminousStarOf Orion constellation
surface form: Orion’s Belt
isPartOf Orion OB association
surface form: Orion OB1 association

Orion OB association
surface form: Orion OB1b subgroup
isReferenceStarFor celestial navigation
isVariableStar true
isVisibleToNakedEye true
locatedIn Orion constellation
luminosity_solarLuminosities about 375000
mass_solarMasses about 30
memberOf Orion constellation
surface form: Orion’s Belt
metallicity_FeH near solar
nameEtymology derived from Arabic meaning “string of pearls” or “sapphire”
nameOriginLanguage Arabic
parallax_mas about 1.6
positionInAsterism central star of Orion’s Belt
properMotionDec_masPerYr about −1.0
properMotionRA_masPerYr about 1.5
radialVelocity_kmPerSec about 27
radius_solarRadii about 30
rightAscension 05h 36m 12.8s
spectralClass B0Ia
variableStarType Alpha Cygni-type variable
willEndAs core-collapse supernova

How these facts were elicited

Referenced by (2)

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

Orion hasStar Alnilam
subject surface form: Orion's Belt