NGC 6864
E526256
NGC 6864 is a dense globular star cluster in the constellation Sagittarius, notable for its rich stellar population and classification as Messier 75 in Charles Messier’s catalog.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 6864 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5240895 — 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 6864 Context triple: [Messier 75, otherName, NGC 6864]
-
A.
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.
-
B.
NGC 6868
NGC 6868 is an elliptical galaxy located in the southern constellation Telescopium, notable for its membership in a small galaxy group and its relatively bright, smooth stellar profile.
-
C.
NGC 6637
NGC 6637 is a dense globular star cluster located in the constellation Sagittarius, notable for its high metallicity and inclusion in Charles Messier’s catalog as Messier 69.
-
D.
NGC 6681
NGC 6681 is a compact globular star cluster located in the constellation Sagittarius, notable for its richness and proximity to the Galactic center.
-
E.
NGC 6618
NGC 6618 is a young, massive open star cluster embedded in the Omega Nebula (M17), notable for its intense star formation and luminous, hot stars.
- 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 6864 Target entity description: NGC 6864 is a dense globular star cluster in the constellation Sagittarius, notable for its rich stellar population and classification as Messier 75 in Charles Messier’s catalog.
-
A.
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.
-
B.
NGC 6868
NGC 6868 is an elliptical galaxy located in the southern constellation Telescopium, notable for its membership in a small galaxy group and its relatively bright, smooth stellar profile.
-
C.
NGC 6637
NGC 6637 is a dense globular star cluster located in the constellation Sagittarius, notable for its high metallicity and inclusion in Charles Messier’s catalog as Messier 69.
-
D.
NGC 6681
NGC 6681 is a compact globular star cluster located in the constellation Sagittarius, notable for its richness and proximity to the Galactic center.
-
E.
NGC 6618
NGC 6618 is a young, massive open star cluster embedded in the Omega Nebula (M17), notable for its intense star formation and luminous, hot stars.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | globular star cluster ⓘ |
| absoluteMagnitudeV | −8.5 ⓘ |
| age | ~13 billion years ⓘ |
| alsoKnownAs |
M75
NERFINISHED
ⓘ
Messier 75 NERFINISHED ⓘ |
| angularSize | 6.8 arcminutes ⓘ |
| apparentMagnitudeRange | 8–9 ⓘ |
| apparentMagnitudeV | 8.6 ⓘ |
| belongsTo | Galactic globular cluster system ⓘ |
| bestSeenFromHemisphere | Southern Hemisphere NERFINISHED ⓘ |
| bestSeenInSeason | summer ⓘ |
| catalog | New General Catalogue NERFINISHED ⓘ |
| concentrationClass | I ⓘ |
| coreConcentration | high ⓘ |
| declination | −21° 55′ 17″ ⓘ |
| discoveredBy | Pierre Méchain NERFINISHED ⓘ |
| discoveryYear | 1780 ⓘ |
| distanceFromEarth |
~20.7 kiloparsecs
ⓘ
~67,500 light-years ⓘ |
| galacticLatitude | −25.75° ⓘ |
| galacticLongitude | 12.18° ⓘ |
| hasAlternativeDesignation |
GCl 116
NERFINISHED
ⓘ
Melotte 222 NERFINISHED ⓘ |
| hasCentralDensity | very high ⓘ |
| hasRichStellarPopulation | true ⓘ |
| hasStellarPopulation | Population II stars ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| includedInCatalog |
Messier catalogue
NERFINISHED
ⓘ
NGC catalogue NERFINISHED ⓘ |
| isDenseCluster | true ⓘ |
| isNotableFor |
classification as Messier 75
ⓘ
high central concentration ⓘ rich stellar population ⓘ |
| locatedIn |
Milky Way
ⓘ
Milky Way halo NERFINISHED ⓘ |
| locatedInConstellation | Sagittarius NERFINISHED ⓘ |
| mass | several hundred thousand solar masses ⓘ |
| messierNumber | 75 ⓘ |
| metallicityFeH | −1.29 ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ |
| radialVelocity | ~−190 km/s ⓘ |
| rightAscension | 20h 06m 05s ⓘ |
| shapleySawyerClass | I ⓘ |
| skyLocation | near the border of Sagittarius and Capricornus ⓘ |
| 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 6864 Description of subject: NGC 6864 is a dense globular star cluster in the constellation Sagittarius, notable for its rich stellar population and classification as Messier 75 in Charles Messier’s catalog.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.