HIP 26727
E540366
HIP 26727 is the Hipparcos catalog designation for Alnitak, a bright multiple star system forming the easternmost star of Orion’s Belt.
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Hipparcos star
ⓘ
multiple star system ⓘ star system ⓘ |
| alsoKnownAs |
Alnitak
NERFINISHED
ⓘ
Zeta Orionis NERFINISHED ⓘ ζ Orionis NERFINISHED ⓘ |
| apparentMagnitudeV | 1.72 ⓘ |
| belongsToAssociation | Orion OB1 association NERFINISHED ⓘ |
| belongsToSubgroup | Orion OB1b subgroup NERFINISHED ⓘ |
| BrightStarDesignation | HR 1948 NERFINISHED ⓘ |
| constellation | Orion NERFINISHED ⓘ |
| declination | −01° 56′ 34″ ⓘ |
| distanceFromEarth |
about 250 parsecs
ⓘ
about 800 light-years ⓘ |
| equatorialCoordinateSystem | ICRS NERFINISHED ⓘ |
| evolutionaryStage | massive evolved star ⓘ |
| FlamsteedDesignation | 50 Orionis NERFINISHED ⓘ |
| galacticPopulation | Population I ⓘ |
| hasColorIndexBminusV | about −0.2 ⓘ |
| hasComponent |
Alnitak A
NERFINISHED
ⓘ
Alnitak Aa NERFINISHED ⓘ Alnitak Ab NERFINISHED ⓘ Alnitak B NERFINISHED ⓘ Alnitak C NERFINISHED ⓘ |
| hasStellarWind | strong ⓘ |
| HenryDraperDesignation | HD 37742 NERFINISHED ⓘ |
| isBrightStar | true ⓘ |
| isInCatalog |
Bright Star Catalogue
NERFINISHED
ⓘ
Flamsteed designation system NERFINISHED ⓘ Henry Draper Catalogue NERFINISHED ⓘ Hipparcos Catalogue NERFINISHED ⓘ |
| isIonizingSourceFor | nearby emission nebulae in Orion's Belt region ⓘ |
| isNakedEyeVisible | true ⓘ |
| isPartOfAsterism | Orion's Belt NERFINISHED ⓘ |
| isReferenceStarFor | Orion constellation navigation and star charts ⓘ |
| luminosityOfPrimary | hundreds of thousands of times solar luminosity (order of magnitude) ⓘ |
| massOfPrimary | about 30 solar masses (order of magnitude) ⓘ |
| parallax | 3.00 mas (approximate) ⓘ |
| positionInAsterism | easternmost star of Orion's Belt ⓘ |
| properMotionDec | small negative (few mas/yr) ⓘ |
| properMotionRA | small positive (few mas/yr) ⓘ |
| radialVelocity | about +20 km/s (order of magnitude) ⓘ |
| rightAscension | 05h 40m 45.5s ⓘ |
| spectralType |
O-type supergiant (primary component)
ⓘ
O9.5Iab ⓘ |
| variableStarType | eclipsing binary (for inner pair) ⓘ |
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.