Perseus OB2 association
E100904
Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
All labels observed (13)
How this entity was disambiguated
This entity first appeared as the object of triple T868799 — 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: Perseus OB2 association Context triple: [Orion Arm, contains, Perseus OB2 association]
-
A.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Hyades
The Hyades are a sisterhood of nymphs in Greek mythology, best known for their association with rain and their representation as a prominent open star cluster in the constellation Taurus.
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D.
Baade’s star
Baade’s star is a luminous, variable star in the Andromeda Galaxy notable for its role in Walter Baade’s work refining the cosmic distance scale.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- 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: Perseus OB2 association Target entity description: Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
-
A.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Hyades
The Hyades are a sisterhood of nymphs in Greek mythology, best known for their association with rain and their representation as a prominent open star cluster in the constellation Taurus.
-
D.
Baade’s star
Baade’s star is a luminous, variable star in the Andromeda Galaxy notable for its role in Walter Baade’s work refining the cosmic distance scale.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- F. None of above. chosen
Statements (58)
| Predicate | Object |
|---|---|
| instanceOf |
OB association
ⓘ
stellar association ⓘ |
| age | a few million years ⓘ |
| ageClass | young stellar population ⓘ |
| associatedWith |
Perseus molecular cloud complex
ⓘ
star-forming region in Perseus ⓘ |
| celestialHemisphere | northern celestial hemisphere ⓘ |
| containsStarType |
B-type star
ⓘ
O-type star ⓘ OB-type star ⓘ T Tauri star ⓘ pre-main-sequence star ⓘ |
| discoveredBy | early 20th century astronomers ⓘ |
| distanceFromEarth |
approximately 1000 light-years
ⓘ
approximately 300 parsecs ⓘ |
| hasKinematicProperty |
common proper motion of member stars
ⓘ
similar radial velocities of member stars ⓘ |
| hasMember |
Atik
ⓘ
BD+30 540 ⓘ BD+30 549 ⓘ BD+30 549A ⓘ
linked to:
BD+30 549
BD+30 549B ⓘ
linked to:
BD+30 549
BD+31 643 ⓘ HD 22951 ⓘ HD 23180 ⓘ HD 23630 ⓘ HD 23850 ⓘ HD 24131 ⓘ HD 24398 ⓘ HD 24534 ⓘ HD 24760 ⓘ HD 24912 ⓘ HD 24970 ⓘ HD 25443 ⓘ HD 25539 ⓘ HD 25833 ⓘ HD 25940 ⓘ HD 26165 ⓘ HD 26311 ⓘ HD 26499 ⓘ HD 278942 ⓘ HD 281159 ⓘ Menkib ⓘ o Persei ⓘ ζ Persei ⓘ ξ Persei ⓘ |
| hasPhysicalProperty |
low stellar density compared to bound clusters
ⓘ
unbound or marginally bound stellar system ⓘ |
| locatedIn | Milky Way ⓘ |
| locatedInConstellation | Perseus ⓘ |
| memberOf |
Local Arm of the Milky Way
ⓘ
linked to:
Orion Arm
|
| observedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ |
| partOf |
Gould Belt region
ⓘ
linked to:
Gould Belt
|
| usedForStudyOf |
early stellar evolution
ⓘ
initial mass function in OB associations ⓘ massive star formation ⓘ |
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: Perseus OB2 association Description of subject: Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
Referenced by (64)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Perseus OB2 association
linked to: Perseus OB2 association
linked to: Perseus OB2 association
linked to: Perseus OB2 association
linked to: Perseus OB2 association