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gptkbp:instanceOf
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gptkb:star
red supergiant
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|
gptkbp:apparentMagnitude
|
1.69
|
|
gptkbp:catalogue
|
gptkb:Henry_Draper_Catalogue
gptkb:Hipparcos_Catalogue
gptkb:Bright_Star_Catalogue
|
|
gptkbp:constellation
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gptkb:Orion
|
|
gptkbp:declination
|
-01° 12′ 07″
|
|
gptkbp:diameter
|
about 32 solar radii
|
|
gptkbp:discoveredBy
|
ancient astronomers
|
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gptkbp:distanceFromEarth
|
about 2,000 light-years
|
|
gptkbp:evolutionaryStage
|
post-main sequence
|
|
gptkbp:expansion
|
expected to become a supernova
|
|
gptkbp:galaxyType
|
blue supergiant
|
|
gptkbp:hasViewOf
|
gptkb:Earth
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
ε Orionis
|
|
gptkbp:luminosity
|
about 375,000 times Sun
|
|
gptkbp:mass
|
about 40 solar masses
|
|
gptkbp:metallicity
|
slightly sub-solar
|
|
gptkbp:notableFor
|
central star of Orion's Belt
|
|
gptkbp:otherName
|
gptkb:Alnilam
gptkb:HD_37128
gptkb:HIP_26311
gptkb:HR_1903
|
|
gptkbp:parallax
|
1.56 mas
|
|
gptkbp:partOf
|
gptkb:Orion's_Belt
|
|
gptkbp:positionInOrion'sBelt
|
central star
|
|
gptkbp:properMotionRA
|
0.23 mas/yr
1.06 mas/yr
|
|
gptkbp:radialVelocity
|
+27.3 km/s
|
|
gptkbp:rightAscension
|
05h 36m 12.8s
|
|
gptkbp:spectralType
|
B0 Ia
|
|
gptkbp:temperature
|
about 27,500 K
|
|
gptkbp:variableStar
|
yes
|
|
gptkbp:variant
|
gptkb:Alpha_Cygni_variable
|
|
gptkbp:bfsParent
|
gptkb:Alnilam
|
|
gptkbp:bfsLayer
|
6
|