Alnitak

E126206

Alnitak is a bright multiple star system in the constellation Orion, forming the easternmost star of the prominent asterism known as Orion’s Belt.

All labels observed (7)

Label Occurrences
Alnitak canonical 24
Alnitak Ab 5
Alnitak B 4

How this entity was disambiguated

Statements (49)

Predicate Object
instanceOf astronomical object
multiple star system
stellar system
absoluteMagnitudeV −5.25
age_Myr about 6
apparentMagnitudeV 1.72
belongsToAssociation Orion OB1 association
belongsToSubgroup Orion OB1b subgroup
bestSeenInMonth January
colorIndexBminusV −0.20
declination −01° 56′ 34″
distanceFromEarth_ly about 1260 light-years
distanceFromEarth_pc about 387 parsecs
effectiveTemperature_K about 29000
eponymLanguage Arabic
equatorialCoordinateSystem ICRS
galacticLatitude −16.0°
galacticLongitude 206.45°
hasBayerDesignation Zeta Orionis
hasBDDesignation +−01° 969
hasComponent Alnitak Aa
linked to: Alnitak

Alnitak Ab
linked to: Alnitak

Alnitak B
linked to: Alnitak

Alnitak C
linked to: Alnitak
hasFlamsteedDesignation 50 Orionis
hasHDDesignation HD 37742
hasHIPDesignation HIP 26727
hasHRDesignation HR 1948
hasNearbyObject Flame Nebula (NGC 2024)
linked to: Flame Nebula

Horsehead Nebula (Barnard 33)
linked to: Horsehead Nebula
hasSAODesignation SAO 132444
isIonizingSourceFor nearby emission nebulae
isPartOfAsterism Orion's Belt
linked to: Orion constellation
locatedInConstellation Orion
luminositySolar about 250000
massSolar about 33
nameEtymology derived from Arabic "al-niṭāq" meaning "the girdle" or "the belt"
parallax_mas 2.58
parallaxError_mas 0.39
positionInOrionsBelt easternmost star
properMotionDec_masPerYr +2.20
properMotionRA_masPerYr +3.01
radialVelocity_kmPerSec +16
radiusSolar about 20
rightAscension 05h 40m 45.5s
spectralType O9.5 Iab
variableType eclipsing variable candidate
visibleIn Northern Hemisphere
Southern Hemisphere

How these facts were elicited

Referenced by (41)

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

Orion's Belt hasStar Alnitak
subject linked to: Orion
Alnitak hasComponent Alnitak Aa
linked to: Alnitak
Alnitak hasComponent Alnitak Ab
linked to: Alnitak
Alnitak hasComponent Alnitak B
linked to: Alnitak
Alnitak hasComponent Alnitak C
linked to: Alnitak
Horsehead Nebula visibleNear Alnitak
Orion containsStar Alnitak
subject linked to: Orion constellation
Orion containsBlueSupergiant Alnitak
subject linked to: Orion constellation
Orion containsMultipleStarSystem Alnitak
subject linked to: Orion constellation
Barnard 33 near Alnitak
NGC 2023 near Alnitak
subject linked to: NGC 2023 reflection nebula
NGC 2024 nearObject Alnitak
NGC 2024 ionizingSource Alnitak
Flame Nebula ionizedBy Alnitak
Flame Nebula near Alnitak
Zeta Orionis alsoKnownAs Alnitak
Zeta Orionis hasProperName Alnitak
50 Orionis isCounterpartOf Alnitak
50 Orionis isNearOnSky Alnitak
HR 1948 alsoKnownAs Alnitak
HR 1948 hasComponent Alnitak A
linked to: Alnitak
HR 1948 hasComponent Alnitak B
linked to: Alnitak
HR 1948 hasComponent Alnitak Aa
linked to: Alnitak
HR 1948 hasComponent Alnitak Ab
linked to: Alnitak
HR 1948 orbitalCompanion Alnitak Ab
linked to: Alnitak
HD 37742 alsoKnownAs Alnitak
HIP 26727 alsoKnownAs Alnitak
HIP 26727 hasComponent Alnitak A
linked to: Alnitak
HIP 26727 hasComponent Alnitak Aa
linked to: Alnitak
HIP 26727 hasComponent Alnitak Ab
linked to: Alnitak
HIP 26727 hasComponent Alnitak B
linked to: Alnitak
SAO 132444 refersTo Alnitak
SAO 132444 hasComponent Alnitak A
linked to: Alnitak
SAO 132444 hasComponent Alnitak B
linked to: Alnitak
SAO 132444 hasComponent Alnitak Ab
linked to: Alnitak
SAO 132444 hasProperName Alnitak
HR 1852 hasAlternativeName Alnitak–Alnilam–Mintaka belt member
linked to: Alnitak
HR 1903 neighboringBeltStar Alnitak