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gptkbp:instanceOf
|
gptkb:star
stellar classification
red supergiant
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|
gptkbp:age
|
about 6.4 million years
|
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gptkbp:alsoKnownAs
|
gptkb:Zeta_Orionis_A
gptkb:Alnitak
|
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gptkbp:apparentMagnitude
|
1.74
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gptkbp:BayerDesignation
|
gptkb:Zeta_Orionis
|
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gptkbp:catalogueNumber
|
gptkb:ADS_4134
gptkb:BD-01_969
gptkb:HIP_26727
gptkb:HR_1948
gptkb:SAO_132374
gptkb:WDS_J05407-0157
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|
gptkbp:declination
|
-01° 56′ 34″
|
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gptkbp:diameter
|
about 20 solar radii
|
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gptkbp:discoveredBy
|
gptkb:John_Flamsteed
|
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gptkbp:discoveredIn
|
pre-1712
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gptkbp:distanceFromEarth
|
approximately 736 light years
|
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gptkbp:evolutionaryStage
|
supergiant
|
|
gptkbp:FlamsteedDesignation
|
gptkb:Alnitak
|
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gptkbp:hasCompanion
|
gptkb:HD_37743
gptkb:HD_37744
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
HD 37742
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gptkbp:locatedIn
|
gptkb:Orion_constellation
|
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gptkbp:luminosity
|
about 250,000 times solar luminosity
|
|
gptkbp:mass
|
about 33 solar masses
|
|
gptkbp:metallicity
|
-0.13 [Fe/H]
|
|
gptkbp:parallax
|
4.43 mas
|
|
gptkbp:partOf
|
gptkb:Orion's_Belt
binary star system
|
|
gptkbp:properMotionRA
|
2.44 mas/yr
3.09 mas/yr
|
|
gptkbp:rightAscension
|
05h 40m 45.5s
|
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gptkbp:rotationPeriod
|
110 km/s
|
|
gptkbp:spectralType
|
O9.5Iab
|
|
gptkbp:temperature
|
about 29,500 K
|
|
gptkbp:variableStar
|
gptkb:Alpha_Cygni_variable
|
|
gptkbp:visibleToNakedEye
|
true
|
|
gptkbp:bfsParent
|
gptkb:Alnitak
gptkb:FK5_286
|
|
gptkbp:bfsLayer
|
6
|