HD 37128
E545062
HD 37128, better known as Alnilam, is a luminous blue supergiant star forming the central star of Orion’s Belt in the constellation Orion.
All labels observed (1)
| Label | Occurrences |
|---|---|
| HD 37128 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775408 — 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: HD 37128 Context triple: [Alnilam, catalogIdentifier, HD 37128]
-
A.
HD 37742
HD 37742 is the bright blue supergiant star better known as Alnitak, the easternmost star in Orion’s Belt.
-
B.
HD 23480
HD 23480 is a bright B-type main-sequence star in the constellation Taurus, visible to the naked eye and cataloged under multiple stellar designations including 23 Tauri.
-
C.
HD 36486
HD 36486 is the stellar catalog designation for Mintaka, a bright multiple star system that forms the westernmost star in Orion’s Belt.
-
D.
HD 24912
HD 24912, also known as ξ Persei, is a bright, massive O-type star in the constellation Perseus and a prominent member of the Perseus OB2 stellar association.
-
E.
HD 26311
HD 26311 is a hot, massive young star located in the Perseus constellation as part of the Perseus OB2 stellar association.
- 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: HD 37128 Target entity description: HD 37128, better known as Alnilam, is a luminous blue supergiant star forming the central star of Orion’s Belt in the constellation Orion.
-
A.
HD 37742
HD 37742 is the bright blue supergiant star better known as Alnitak, the easternmost star in Orion’s Belt.
-
B.
HD 23480
HD 23480 is a bright B-type main-sequence star in the constellation Taurus, visible to the naked eye and cataloged under multiple stellar designations including 23 Tauri.
-
C.
HD 36486
HD 36486 is the stellar catalog designation for Mintaka, a bright multiple star system that forms the westernmost star in Orion’s Belt.
-
D.
HD 24912
HD 24912, also known as ξ Persei, is a bright, massive O-type star in the constellation Perseus and a prominent member of the Perseus OB2 stellar association.
-
E.
HD 26311
HD 26311 is a hot, massive young star located in the Perseus constellation as part of the Perseus OB2 stellar association.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
spectroscopic binary candidate
ⓘ
star ⓘ supergiant star ⓘ |
| belongsToAssociation | Orion OB1 association NERFINISHED ⓘ |
| belongsToSubgroup | Orion OB1b subgroup NERFINISHED ⓘ |
| hasAbsoluteMagnitudeV | −6.4 ⓘ |
| hasAge | about 5.7 million years ⓘ |
| hasAlternativeName |
Alnilam
NERFINISHED
ⓘ
BD−01°969 NERFINISHED ⓘ Epsilon Orionis NERFINISHED ⓘ FK5 187 NERFINISHED ⓘ HIP 26451 NERFINISHED ⓘ HR 1899 NERFINISHED ⓘ SAO 132444 NERFINISHED ⓘ ε Ori NERFINISHED ⓘ ε Orionis NERFINISHED ⓘ |
| hasApparentMagnitudeV |
1.69
ⓘ
1.70 ⓘ |
| hasArabicNameMeaning | string of pearls ⓘ |
| hasCatalogDesignation | HD 37128 NERFINISHED ⓘ |
| hasColorIndexBMinusV | −0.19 ⓘ |
| hasConstellation | Orion NERFINISHED ⓘ |
| hasDeclination | −01° 12′ 07″ ⓘ |
| hasDistance |
about 2,000 light-years
ⓘ
about 600 pc ⓘ |
| hasEffectiveTemperature | about 27,500 K ⓘ |
| hasLuminosity | about 375,000 times solar luminosity ⓘ |
| hasMass | about 40 solar masses ⓘ |
| hasMetallicity | approximately solar ⓘ |
| hasParallax | 1.78 mas ⓘ |
| hasProperMotionDec | −1.99 mas/yr ⓘ |
| hasProperMotionRA | 1.55 mas/yr ⓘ |
| hasRadialVelocity | 27 km/s ⓘ |
| hasRadius | about 32 solar radii ⓘ |
| hasRightAscension | 05h 36m 12.8s ⓘ |
| hasRotationalVelocity | 40 km/s ⓘ |
| hasSpectralType | B0Ia ⓘ |
| hasVariabilityAmplitude | about 0.05 magnitudes ⓘ |
| hasVariableType | Alpha Cygni-type variable ⓘ |
| isCentralStarOf | Orion's Belt NERFINISHED ⓘ |
| isLocatedIn |
Milky Way
NERFINISHED
ⓘ
Orion Molecular Cloud Complex NERFINISHED ⓘ |
| isOneOfBrightestStarsIn | constellation Orion NERFINISHED ⓘ |
| isPartOfAsterism | Orion's Belt NERFINISHED ⓘ |
| isVisibleToNakedEye | true ⓘ |
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: HD 37128 Description of subject: HD 37128, better known as Alnilam, is a luminous blue supergiant star forming the central star of Orion’s Belt in the constellation Orion.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.