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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HR 1948 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5723589 — 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: HR 1948 Context triple: [Alnitak, hasHRDesignation, HR 1948]
-
A.
HR 1149
HR 1149 is a star in the Pleiades open star cluster, also known by the traditional name Taygeta.
-
B.
HR 1084
HR 1084 is the catalog designation for Epsilon Eridani, a nearby young K-type main-sequence star known for its prominent debris disk and exoplanetary system.
-
C.
HR 4853
HR 4853 is a bright, massive blue giant star in the constellation Crux, better known by its Bayer designation Beta Crucis.
-
D.
HR 1178
HR 1178 is a bright blue-white star in the Pleiades open star cluster in the constellation Taurus, traditionally known as Sterope I.
-
E.
HR 4729
HR 4729 is a bright, massive blue star in the Southern Cross constellation, forming part of the multiple-star system Alpha Crucis.
- 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: HR 1948 Target entity description: HR 1948 is the Bright Star Catalogue designation for Alnitak, a prominent blue supergiant star forming the easternmost member of Orion’s Belt.
-
A.
HR 1149
HR 1149 is a star in the Pleiades open star cluster, also known by the traditional name Taygeta.
-
B.
HR 1084
HR 1084 is the catalog designation for Epsilon Eridani, a nearby young K-type main-sequence star known for its prominent debris disk and exoplanetary system.
-
C.
HR 4853
HR 4853 is a bright, massive blue giant star in the constellation Crux, better known by its Bayer designation Beta Crucis.
-
D.
HR 1178
HR 1178 is a bright blue-white star in the Pleiades open star cluster in the constellation Taurus, traditionally known as Sterope I.
-
E.
HR 4729
HR 4729 is a bright, massive blue star in the Southern Cross constellation, forming part of the multiple-star system Alpha Crucis.
- F. None of above. chosen
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 ⓘ |
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: HR 1948 Description of subject: HR 1948 is the Bright Star Catalogue designation for Alnitak, a prominent blue supergiant star forming the easternmost member of Orion’s Belt.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.