BD+31 643
E459041
BD+31 643 is a young, massive star system located in the Perseus OB2 stellar association, notable for its role in studies of early stellar evolution and circumstellar material.
All labels observed (3)
| Label | Occurrences |
|---|---|
| BD+31 643 canonical | 2 |
| BD+31 643 A | 1 |
| BD+31 643 B | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4617655 — 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: BD+31 643 Context triple: [Perseus OB2 association, hasMember, BD+31 643]
-
A.
BdM
BdM is the central bank of Mexico, responsible for maintaining the country’s monetary stability and issuing its currency.
-
B.
BD+
BD+ is an additional digital rights management and content protection system used on Blu-ray Discs to prevent unauthorized copying and tampering.
-
C.
BDA
BDA is the IATA airport code for L.F. Wade International Airport, the main international gateway to Bermuda.
-
D.
BDA
BDA is the common abbreviation for Blu-ray Disc, a high-definition optical disc format used for storing and playing back movies, games, and other digital media.
-
E.
BB-31
BB-31 was the original battleship designation for USS Utah, a Florida-class dreadnought that later served as a target and training ship for the U.S. Navy.
- 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: BD+31 643 Target entity description: BD+31 643 is a young, massive star system located in the Perseus OB2 stellar association, notable for its role in studies of early stellar evolution and circumstellar material.
-
A.
BdM
BdM is the central bank of Mexico, responsible for maintaining the country’s monetary stability and issuing its currency.
-
B.
BD+
BD+ is an additional digital rights management and content protection system used on Blu-ray Discs to prevent unauthorized copying and tampering.
-
C.
BDA
BDA is the IATA airport code for L.F. Wade International Airport, the main international gateway to Bermuda.
-
D.
BDA
BDA is the common abbreviation for Blu-ray Disc, a high-definition optical disc format used for storing and playing back movies, games, and other digital media.
-
E.
BB-31
BB-31 was the original battleship designation for USS Utah, a Florida-class dreadnought that later served as a target and training ship for the U.S. Navy.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
B-type main-sequence star
ⓘ
B-type main-sequence star ⓘ B-type star ⓘ binary star system ⓘ stellar system ⓘ young stellar object ⓘ |
| emitsStronglyIn |
optical
ⓘ
ultraviolet ⓘ |
| hasAge | a few million years ⓘ |
| hasAssociatedDust | yes ⓘ |
| hasAssociatedReflectionNebula | yes ⓘ |
| hasCircumstellarMaterial | yes ⓘ |
| hasColorIndex | blue ⓘ |
| hasComponent |
BD+31 643 A
ⓘ
linked to:
BD+31 643
BD+31 643 B ⓘ
linked to:
BD+31 643
|
| hasDeclination | +32° (approximate) ⓘ |
| hasDistanceFromEarth |
about 1000 light-years
ⓘ
about 300 parsecs ⓘ |
| hasEffectiveTemperature | about 15000 K (order of magnitude) ⓘ |
| hasEnvironment |
OB association
ⓘ
star-forming region ⓘ |
| hasGalacticPopulation | Population I ⓘ |
| hasHighMass | yes ⓘ |
| hasInfraredExcess | yes ⓘ |
| hasLuminosityClass | V ⓘ |
| hasNearbyMolecularCloud | yes ⓘ |
| hasObservedDiskOrRingStructure | yes ⓘ |
| hasRightAscension | 03h 44m (approximate) ⓘ |
| hasSpectralType | B-type ⓘ |
| hasStellarClassification | B5 V ⓘ |
| hasStellarWind | yes ⓘ |
| hasVariability | possible or low-level ⓘ |
| is |
massive
ⓘ
young ⓘ |
| isCataloguedIn | Bonner Durchmusterung ⓘ |
| isImportantFor |
constraining models of circumstellar disks around massive stars
ⓘ
understanding early evolution of B-type stars ⓘ |
| isSubjectOf |
high-resolution imaging studies
ⓘ
polarimetric studies ⓘ spectroscopic studies ⓘ |
| isUsedForStudyOf |
circumstellar material
ⓘ
early stellar evolution ⓘ protoplanetary environments ⓘ |
| locatedIn |
Perseus OB2 association
ⓘ
Perseus constellation ⓘ |
| memberOf |
Perseus OB2 stellar association
ⓘ
linked to:
Perseus OB2 association
|
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: BD+31 643 Description of subject: BD+31 643 is a young, massive star system located in the Perseus OB2 stellar association, notable for its role in studies of early stellar evolution and circumstellar material.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: BD+31 643
linked to: BD+31 643