o Persei
E459031
o Persei is a bright B-type giant star in the constellation Perseus and a notable member of the Perseus OB2 stellar association.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T4617631 — 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: o Persei Context triple: [Perseus OB2 association, hasMember, o Persei]
-
A.
Perseus constellation
Perseus constellation is a prominent northern sky constellation named after the Greek mythological hero Perseus, known for containing the famous variable star Algol and the Double Cluster.
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B.
Cassiopeia
"Cassiopeia" is a track by the indie music project Walnut Whales, known for its gentle, atmospheric style.
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C.
Cassiopeia
Cassiopeia is a prominent W-shaped constellation in the northern sky, easily recognizable and rich in notable deep-sky objects and astronomical phenomena.
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D.
Cassiopeia
Cassiopeia is a song by Joanna Newsom, known for its intricate harp accompaniment and mythologically inspired lyrics.
-
E.
Scorpius
Scorpius is a prominent zodiac constellation in the southern sky, easily recognized by its curved "scorpion's tail" and bright red supergiant star Antares.
- 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: o Persei Target entity description: o Persei is a bright B-type giant star in the constellation Perseus and a notable member of the Perseus OB2 stellar association.
-
A.
Perseus constellation
Perseus constellation is a prominent northern sky constellation named after the Greek mythological hero Perseus, known for containing the famous variable star Algol and the Double Cluster.
-
B.
Cassiopeia
"Cassiopeia" is a track by the indie music project Walnut Whales, known for its gentle, atmospheric style.
-
C.
Cassiopeia
Cassiopeia is a prominent W-shaped constellation in the northern sky, easily recognizable and rich in notable deep-sky objects and astronomical phenomena.
-
D.
Cassiopeia
Cassiopeia is a song by Joanna Newsom, known for its intricate harp accompaniment and mythologically inspired lyrics.
-
E.
Scorpius
Scorpius is a prominent zodiac constellation in the southern sky, easily recognized by its curved "scorpion's tail" and bright red supergiant star Antares.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
B-type giant star
ⓘ
spectroscopic binary ⓘ star ⓘ |
| absoluteMagnitudeV | about -4.5 ⓘ |
| age | ~10 million years ⓘ |
| apparentMagnitudeV | 3.83 ⓘ |
| BayerDesignation | o Persei NERFINISHED ⓘ |
| BDNumber | +31 0552 ⓘ |
| belongsTo | Milky Way NERFINISHED ⓘ |
| binaryCompanionType | early-type star ⓘ |
| binaryOrbitalEccentricity | low ⓘ |
| binaryOrbitalPeriod | ~4.4 days ⓘ |
| colorIndexBminusV | about -0.20 ⓘ |
| constellation | Perseus NERFINISHED ⓘ |
| coreFusion | helium-burning core ⓘ |
| declination | +32° 17′ 18″ ⓘ |
| distanceFromEarth |
~230 parsecs
ⓘ
~760 light-years ⓘ |
| effectiveTemperature | ~24,000 K ⓘ |
| equatorialCoordinateSystem | ICRS NERFINISHED ⓘ |
| evolutionaryStage | post-main-sequence ⓘ |
| FlamsteedDesignation | 38 Persei ⓘ |
| galacticLatitude | -17° ⓘ |
| galacticLongitude | 160° ⓘ |
| galacticPopulation | young disk ⓘ |
| hasStellarWind | yes ⓘ |
| HDNumber | HD 23180 NERFINISHED ⓘ |
| HIPNumber | HIP 17608 NERFINISHED ⓘ |
| HRNumber | HR 1156 NERFINISHED ⓘ |
| locatedIn | Perseus OB2 association NERFINISHED ⓘ |
| luminosity | ~20,000 times solar ⓘ |
| mass | ~11 solar masses ⓘ |
| memberOf | Perseus OB2 association NERFINISHED ⓘ |
| parallax | 4.30 mas ⓘ |
| properMotionDec | -25 mas/yr ⓘ |
| properMotionRA | +22 mas/yr ⓘ |
| radialVelocity | +7 km/s ⓘ |
| radius | ~10 solar radii ⓘ |
| rightAscension | 03h 41m 24s ⓘ |
| SIMBADIdentifier | omi Per NERFINISHED ⓘ |
| spectralClass | B1III ⓘ |
| variableType | ellipsoidal variable ⓘ |
| visibility | naked-eye star ⓘ |
| visibleIn | northern hemisphere ⓘ |
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: o Persei Description of subject: o Persei is a bright B-type giant star in the constellation Perseus and a notable member of the Perseus OB2 stellar association.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Persei