HR 1948
E540364
HR 1948 is the Bright Star Catalogue designation for Alnitak, a prominent blue supergiant star forming the easternmost member of Orion’s Belt.
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
blue supergiant
ⓘ
star ⓘ |
| absoluteMagnitudeV | about −5.3 ⓘ |
| alsoKnownAs |
Alnitak
NERFINISHED
ⓘ
Zeta Orionis NERFINISHED ⓘ ζ Orionis NERFINISHED ⓘ |
| apparentMagnitudeV | about 1.7 ⓘ |
| associatedNebula |
Flame Nebula (NGC 2024)
NERFINISHED
ⓘ
Horsehead Nebula region NERFINISHED ⓘ |
| beltPosition | easternmost star of Orion’s Belt ⓘ |
| catalogDesignation |
HD 37742
NERFINISHED
ⓘ
HIP 26727 NERFINISHED ⓘ HR 1948 NERFINISHED ⓘ SAO 132444 NERFINISHED ⓘ |
| colorIndex | blue ⓘ |
| constellation | Orion NERFINISHED ⓘ |
| culturalSignificance | prominent navigational star in Orion’s Belt ⓘ |
| declination | −01° 56′ 34″ ⓘ |
| distanceFromEarth_ly | about 1260 ⓘ |
| distanceFromEarth_pc | about 387 ⓘ |
| effectiveTemperature_K | about 29000 ⓘ |
| evolutionaryStage | post-main-sequence massive star ⓘ |
| futureEvolution | likely core-collapse supernova progenitor ⓘ |
| galacticPopulation | Orion OB1 association NERFINISHED ⓘ |
| hasComponent |
Alnitak A
NERFINISHED
ⓘ
Alnitak Aa NERFINISHED ⓘ Alnitak Ab NERFINISHED ⓘ Alnitak B NERFINISHED ⓘ |
| hemisphereVisibility | both hemispheres ⓘ |
| ionizes | nearby interstellar gas ⓘ |
| isComponentOf | Alnitak multiple system NERFINISHED ⓘ |
| isIn |
Milky Way
NERFINISHED
ⓘ
Orion Molecular Cloud Complex NERFINISHED ⓘ |
| isPartOf | Orion’s Belt NERFINISHED ⓘ |
| luminosity_solar | about 100000 ⓘ |
| mass_solar | about 33 ⓘ |
| metallicity | near-solar ⓘ |
| orbitalCompanion | Alnitak Ab NERFINISHED ⓘ |
| orbitalPeriod_years | about 7.3 ⓘ |
| parallax_mas | about 2.6 ⓘ |
| properMotionDec_mas_yr | about +2 ⓘ |
| properMotionRA_mas_yr | about +3 ⓘ |
| radialVelocity_km_s | about +16 ⓘ |
| radius_solar | about 20 ⓘ |
| rightAscension | 05h 40m 45s ⓘ |
| spectralType | O9.5 Iab ⓘ |
| visibility | naked-eye star ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.