M67
E584561
M67 is an ancient, metal-rich open star cluster in the constellation Cancer, notable for its well-studied stellar population and importance in understanding stellar evolution.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T6301645 — 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: M67 Context triple: [Messier 67, catalogCode, M67]
-
A.
M67
M67 is a short motorway in Greater Manchester, England, connecting the M60 near Denton towards Hyde and intended as the first section of an unrealized trans-Pennine route.
-
B.
M66
M66 is a motorway in Greater Manchester, England, forming part of the route between Manchester and the M62 near Bury.
-
C.
M86
M86 is a giant elliptical galaxy in the constellation Virgo and one of the prominent members of the Virgo Cluster.
-
D.
M69
M69 is a dense globular star cluster located in the constellation Sagittarius and listed in Charles Messier’s catalog of deep-sky objects.
-
E.
M57
M57 is a major motorway in Merseyside, England, forming part of the road network serving the Sefton area and connecting it to other key routes in the region.
- 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: M67 Target entity description: M67 is an ancient, metal-rich open star cluster in the constellation Cancer, notable for its well-studied stellar population and importance in understanding stellar evolution.
-
A.
M67
M67 is a short motorway in Greater Manchester, England, connecting the M60 near Denton towards Hyde and intended as the first section of an unrealized trans-Pennine route.
-
B.
M66
M66 is a motorway in Greater Manchester, England, forming part of the route between Manchester and the M62 near Bury.
-
C.
M86
M86 is a giant elliptical galaxy in the constellation Virgo and one of the prominent members of the Virgo Cluster.
-
D.
M69
M69 is a dense globular star cluster located in the constellation Sagittarius and listed in Charles Messier’s catalog of deep-sky objects.
-
E.
M57
M57 is a major motorway in Merseyside, England, forming part of the road network serving the Sefton area and connecting it to other key routes in the region.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| addedToMessierCatalogue | 1780 ⓘ |
| age |
about 4 billion years
ⓘ
comparable to the Sun ⓘ |
| angularSize | about 30 arcminutes ⓘ |
| apparentMagnitudeV | about 6.1 ⓘ |
| bestSeenIn | spring in the Northern Hemisphere ⓘ |
| catalogNumber |
M67
ⓘ
Messier 67 NERFINISHED ⓘ NGC 2682 NERFINISHED ⓘ |
| constellation | Cancer NERFINISHED ⓘ |
| contains |
blue straggler stars
ⓘ
red giant stars ⓘ solar analogs ⓘ white dwarfs ⓘ |
| coreRadius | about 1 parsec ⓘ |
| declination | +11° 49′ ⓘ |
| discoveredBy | Johann Gottfried Koehler NERFINISHED ⓘ |
| discoveryYear | 1779 ⓘ |
| distanceFromEarth |
about 2700–3000 light-years
ⓘ
about 800–900 parsecs ⓘ |
| estimatedMass | about 1000 solar masses ⓘ |
| estimatedNumberOfStars |
about 500
ⓘ
several hundred ⓘ |
| galacticLatitude | +32° ⓘ |
| galacticLongitude | about 215° ⓘ |
| galacticPopulation | Galactic disk ⓘ |
| has | near-solar metallicity ⓘ |
| hasHigh | binary star fraction ⓘ |
| locatedIn | Milky Way ⓘ |
| metallicity | metal-rich ⓘ |
| metallicityRelativeToSun | approximately solar or slightly above ⓘ |
| notableFor |
importance in understanding stellar evolution
ⓘ
rich population of solar-type stars ⓘ well-studied stellar population ⓘ |
| observedBy | Charles Messier NERFINISHED ⓘ |
| rightAscension | 08h 51m ⓘ |
| tidalRadius | about 10 parsecs ⓘ |
| usedAs |
benchmark open cluster for stellar evolution models
ⓘ
reference for gyrochronology studies ⓘ reference for stellar isochrone calibration ⓘ |
| usedToStudy |
mass loss in stars
ⓘ
stellar activity ⓘ stellar rotation ⓘ white dwarf cooling sequences ⓘ |
| visibility | visible with binoculars under dark skies ⓘ |
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: M67 Description of subject: M67 is an ancient, metal-rich open star cluster in the constellation Cancer, notable for its well-studied stellar population and importance in understanding stellar evolution.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
M 67