|
gptkbp:instanceOf
|
gptkb:star
|
|
gptkbp:age
|
about 6.4
|
|
gptkbp:apparentMagnitude
|
1.77
|
|
gptkbp:associatedNebula
|
gptkb:Horsehead_Nebula
gptkb:Flame_Nebula
|
|
gptkbp:catalogueNumber
|
gptkb:BD−01°_969
gptkb:HD_37742
gptkb:HIP_26727
gptkb:HR_1948
gptkb:SAO_132374
gptkb:WDS_J05407-0157
gptkb:FK5_208
|
|
gptkbp:colorIndex_UB
|
−1.01
|
|
gptkbp:colorIndexB-V
|
−0.21
|
|
gptkbp:component
|
gptkb:Alnitak_Aa
gptkb:Alnitak_Ab
gptkb:Alnitak_B
|
|
gptkbp:constellation
|
gptkb:Orion
|
|
gptkbp:declination
|
−01° 56′ 34″
|
|
gptkbp:diameter
|
about 20
|
|
gptkbp:discoveredBy
|
gptkb:John_Herschel_(binary_nature)
|
|
gptkbp:distanceFromEarth
|
approximately 736
|
|
gptkbp:evolutionaryStage
|
supergiant
|
|
gptkbp:hasCompanion
|
gptkb:Alnitak_Ab
gptkb:Alnitak_B
|
|
gptkbp:hasExoplanet
|
no known exoplanets
|
|
gptkbp:hasViewOf
|
gptkb:Northern_Hemisphere
gptkb:Southern_Hemisphere
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Alnitak
|
|
gptkbp:IAUApprovedName
|
gptkb:Alnitak
|
|
gptkbp:luminosity
|
about 100,000
|
|
gptkbp:mass
|
about 33
|
|
gptkbp:metallicity
|
−0.20
|
|
gptkbp:notableFor
|
brightest O-type star visible to the naked eye
easternmost star in Orion's Belt
|
|
gptkbp:otherName
|
gptkb:Zeta_Orionis
|
|
gptkbp:parallax
|
4.43
|
|
gptkbp:partOf
|
gptkb:Orion's_Belt
|
|
gptkbp:properMotionRA
|
2.44 mas/yr
3.09 mas/yr
|
|
gptkbp:radialVelocity_kmps
|
+25.2
|
|
gptkbp:rightAscension
|
05h 40m 45.5s
|
|
gptkbp:rotationalVelocity_kmps
|
about 110
|
|
gptkbp:spectralType
|
O9.5Ib
|
|
gptkbp:stellarSystem
|
binary star system
|
|
gptkbp:temperature
|
about 29,500
|
|
gptkbp:variableStar
|
gptkb:Beta_Cephei_variable
|
|
gptkbp:bfsParent
|
gptkb:Orion
|
|
gptkbp:bfsLayer
|
5
|