NGC 2506
E566850
NGC 2506 is an open star cluster located in the constellation Monoceros, known for its richness and relatively old stellar population.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 2506 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775491 — 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: NGC 2506 Context triple: [Monoceros, contains, NGC 2506]
-
A.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
-
B.
NGC 6626
NGC 6626 is a bright globular star cluster in the constellation Sagittarius, notable for its dense concentration of ancient stars and its inclusion in Charles Messier’s catalog as Messier 28.
-
C.
NGC 6656
NGC 6656 is a bright globular star cluster in the constellation Sagittarius, notable as one of the closest and most easily observed globular clusters from Earth.
-
D.
NGC 2976
NGC 2976 is a nearby dwarf spiral galaxy in the constellation Ursa Major and a member of the M81 Group of galaxies.
-
E.
NGC 6664
NGC 6664 is an open star cluster located in the constellation Scutum, notable for its grouping of young stars within the Milky Way.
- 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: NGC 2506 Target entity description: NGC 2506 is an open star cluster located in the constellation Monoceros, known for its richness and relatively old stellar population.
-
A.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
-
B.
NGC 6626
NGC 6626 is a bright globular star cluster in the constellation Sagittarius, notable for its dense concentration of ancient stars and its inclusion in Charles Messier’s catalog as Messier 28.
-
C.
NGC 6656
NGC 6656 is a bright globular star cluster in the constellation Sagittarius, notable as one of the closest and most easily observed globular clusters from Earth.
-
D.
NGC 2976
NGC 2976 is a nearby dwarf spiral galaxy in the constellation Ursa Major and a member of the M81 Group of galaxies.
-
E.
NGC 6664
NGC 6664 is an open star cluster located in the constellation Scutum, notable for its grouping of young stars within the Milky Way.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| age | ~1.8 billion years ⓘ |
| angularSize | 12 arcminutes ⓘ |
| apparentMagnitudeRange | about 7–13 for member stars ⓘ |
| apparentMagnitudeV | 7.6 ⓘ |
| bestSeenFrom | Northern Hemisphere ⓘ |
| bestSeenIn | winter ⓘ |
| catalog | NGC ⓘ |
| clusterType | intermediate-age open cluster ⓘ |
| constellation | Monoceros ⓘ |
| contains |
blue straggler stars
ⓘ
main-sequence stars ⓘ red giant stars ⓘ |
| coreConcentration | moderate ⓘ |
| declination | −10° 46′ 12″ ⓘ |
| discoveredBy | William Herschel ⓘ |
| discoveryDate | 1791 ⓘ |
| distanceFromEarth |
~11,300 light-years
ⓘ
~3,500 parsecs ⓘ |
| epoch | J2000 ⓘ |
| galacticLatitude | +09.25° ⓘ |
| galacticLongitude | 226.01° ⓘ |
| hasColorMagnitudeDiagram | well-defined main sequence ⓘ |
| hasMemberCount | several hundred stars ⓘ |
| hasScientificInterest |
Galactic disk evolution studies
ⓘ
stellar evolution studies ⓘ |
| isPartOf | New General Catalogue ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ |
| massSegregation | present ⓘ |
| metallicity | sub-solar ⓘ |
| observationalClass | Trumpler class II 1 r ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| otherDesignation |
C 0757-107
ⓘ
Melotte 80 ⓘ OCL 588 ⓘ |
| richness | rich open cluster ⓘ |
| rightAscension | 08h 00m 01s ⓘ |
| stellarPopulation | relatively old ⓘ |
| usedFor |
age–metallicity relation of open clusters
ⓘ
testing stellar isochrones ⓘ |
| visibleWith | small telescope ⓘ |
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: NGC 2506 Description of subject: NGC 2506 is an open star cluster located in the constellation Monoceros, known for its richness and relatively old stellar population.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.