HIP 26311
E545063
HIP 26311 is the Hipparcos catalog designation for Alnilam, the bright blue supergiant star forming the central point of Orion’s Belt.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HIP 26311 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775409 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: HIP 26311 Context triple: [Alnilam, catalogIdentifier, HIP 26311]
-
A.
HIP 26727
HIP 26727 is the Hipparcos catalog designation for Alnitak, a bright multiple star system forming the easternmost star of Orion’s Belt.
-
B.
HIP 62434
HIP 62434 is the Hipparcos catalog designation for Beta Crucis, a bright blue giant star in the Southern Cross constellation.
-
C.
HIP 17531
HIP 17531 is a star in the Pleiades open star cluster, more commonly known by its traditional name Taygeta.
-
D.
HIP 60718
HIP 60718 is the Hipparcos catalog designation for Alpha Crucis, the brightest star in the Southern Cross constellation.
-
E.
HIP 17608
HIP 17608 is a star in the constellation Taurus, more commonly known as 23 Tauri, and is cataloged in the Hipparcos star catalog.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: HIP 26311 Target entity description: HIP 26311 is the Hipparcos catalog designation for Alnilam, the bright blue supergiant star forming the central point of Orion’s Belt.
-
A.
HIP 26727
HIP 26727 is the Hipparcos catalog designation for Alnitak, a bright multiple star system forming the easternmost star of Orion’s Belt.
-
B.
HIP 62434
HIP 62434 is the Hipparcos catalog designation for Beta Crucis, a bright blue giant star in the Southern Cross constellation.
-
C.
HIP 17531
HIP 17531 is a star in the Pleiades open star cluster, more commonly known by its traditional name Taygeta.
-
D.
HIP 60718
HIP 60718 is the Hipparcos catalog designation for Alpha Crucis, the brightest star in the Southern Cross constellation.
-
E.
HIP 17608
HIP 17608 is a star in the constellation Taurus, more commonly known as 23 Tauri, and is cataloged in the Hipparcos star catalog.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Hipparcos catalog star
ⓘ
star ⓘ |
| absoluteMagnitudeV | about −6.4 ⓘ |
| age_Myr | about 5.7 ⓘ |
| alsoKnownAs |
Alnilam
NERFINISHED
ⓘ
Epsilon Orionis NERFINISHED ⓘ |
| apparentMagnitudeV | 1.69 ⓘ |
| belongsToAssociation | Orion OB1 association NERFINISHED ⓘ |
| belongsToSubgroup | Orion OB1b subgroup NERFINISHED ⓘ |
| catalogIdentifier | HIP 26311 NERFINISHED ⓘ |
| color | blue ⓘ |
| constellation | Orion NERFINISHED ⓘ |
| declination_J2000 | −01° 12′ 07″ ⓘ |
| distanceFromEarth_ly | about 2000 ⓘ |
| distanceFromEarth_pc | about 600 ⓘ |
| effectiveTemperature_K | about 27500 ⓘ |
| evolutionaryStage | blue supergiant ⓘ |
| futureEvolution | likely core-collapse supernova ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasBayerDesignation | ε Orionis NERFINISHED ⓘ |
| hasBDDesignation | +−01° 969 ⓘ |
| hasFlamsteedDesignation | 46 Orionis ⓘ |
| hasHDDesignation | HD 37128 NERFINISHED ⓘ |
| hasHRDesignation | HR 1852 NERFINISHED ⓘ |
| hasProperMotion | yes ⓘ |
| hasSAODesignation | SAO 132444 NERFINISHED ⓘ |
| hasVariability | yes ⓘ |
| hemisphereVisibility | both hemispheres ⓘ |
| isBrightStar | yes ⓘ |
| isNakedEyeVisible | yes ⓘ |
| isPartOf | Orion's Belt NERFINISHED ⓘ |
| isPrimaryComponentOf | Orion's Belt asterism NERFINISHED ⓘ |
| luminosity_solar | about 375000 ⓘ |
| luminosityClass | Ia ⓘ |
| mass_solar | about 30 ⓘ |
| metallicity_FeH | approximately solar ⓘ |
| parallax_mas | about 1.8 ⓘ |
| positionInAsterism | central star of Orion's Belt ⓘ |
| properMotionDec_masPerYr | about 0.6 ⓘ |
| properMotionRA_masPerYr | about 1.1 ⓘ |
| radialVelocity_kmPerSec | about 27 ⓘ |
| radius_solar | about 32 ⓘ |
| rankByBrightnessInOrion | among the brightest stars in Orion ⓘ |
| rightAscension_J2000 | 05h 36m 12.8s ⓘ |
| spectralClass | B0 ⓘ |
| spectralType | B0Ia ⓘ |
| variableType | Alpha Cygni variable ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: HIP 26311 Description of subject: HIP 26311 is the Hipparcos catalog designation for Alnilam, the bright blue supergiant star forming the central point of Orion’s Belt.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.