M54
E117416
M54 is a massive globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters discovered to reside outside the Milky Way in a satellite galaxy.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M54 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T992646 — 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: M54 Context triple: [Sagittarius Dwarf Spheroidal Galaxy, associatedGlobularCluster, M54]
-
A.
M45
M45 is the Pleiades, a prominent open star cluster in the constellation Taurus visible to the naked eye and known since antiquity.
-
B.
M-45
M-45 is a state highway in Michigan that runs east–west through the Grand Rapids area toward the Lake Michigan shoreline.
-
C.
N57
N57 is a major Dutch roadway that runs across the Brouwersdam and other Delta Works structures, connecting coastal regions in the southwest of the Netherlands.
-
D.
Mercury Milan
The Mercury Milan is a mid-size sedan produced by Ford's Mercury division from 2006 to 2011, positioned as a more upscale counterpart to the Ford Fusion.
-
E.
M25
M25 is a major orbital motorway encircling most of Greater London in the United Kingdom.
- 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: M54 Target entity description: M54 is a massive globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters discovered to reside outside the Milky Way in a satellite galaxy.
-
A.
M45
M45 is the Pleiades, a prominent open star cluster in the constellation Taurus visible to the naked eye and known since antiquity.
-
B.
M-45
M-45 is a state highway in Michigan that runs east–west through the Grand Rapids area toward the Lake Michigan shoreline.
-
C.
N57
N57 is a major Dutch roadway that runs across the Brouwersdam and other Delta Works structures, connecting coastal regions in the southwest of the Netherlands.
-
D.
Mercury Milan
The Mercury Milan is a mid-size sedan produced by Ford's Mercury division from 2006 to 2011, positioned as a more upscale counterpart to the Ford Fusion.
-
E.
M25
M25 is a major orbital motorway encircling most of Greater London in the United Kingdom.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | about −10.0 ⓘ |
| age | about 12 billion years ⓘ |
| alsoKnownAs |
GCl 110
ⓘ
Messier 54 ⓘ NGC 6715 ⓘ |
| angularSize | 9.1 arcminutes ⓘ |
| apparentMagnitudeV | 7.6 ⓘ |
| belongsTo | Local Group ⓘ |
| bestSeenIn |
August
ⓘ
summer ⓘ |
| catalog |
Messier catalogue
ⓘ
New General Catalogue ⓘ |
| centralRegion | very compact and bright core ⓘ |
| concentrationClass | V ⓘ |
| coreRadius | about 0.09 arcminutes ⓘ |
| declination | −30° 28′ 47″ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| discoveryDate | 24 July 1778 ⓘ |
| discoveryInstrument | refracting telescope ⓘ |
| distanceFromEarth |
about 26.7 kiloparsecs
ⓘ
about 87,000 light-years ⓘ |
| galacticLatitude | −14.09 degrees ⓘ |
| galacticLongitude | 5.61 degrees ⓘ |
| halfLightRadius | about 0.82 arcminutes ⓘ |
| hasStellarPopulation |
multiple stellar populations
ⓘ
old, low-metallicity stars ⓘ |
| hostGalaxyType | dwarf spheroidal galaxy ⓘ |
| locatedIn |
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
surface form:
Sagittarius Dwarf Elliptical Galaxy
|
| locatedInConstellation | Sagittarius ⓘ |
| locatedInGalaxy | Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| locatedOutsideGalaxy | Milky Way ⓘ |
| metallicityFeH | about −1.5 ⓘ |
| notableFor |
being one of the first globular clusters identified in a satellite galaxy of the Milky Way
ⓘ
high mass compared to typical Milky Way globular clusters ⓘ |
| observedAs | unresolved patch of light in small amateur telescopes ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ |
| partOf |
Sagittarius Dwarf Spheroidal Galaxy
ⓘ
surface form:
Sagittarius Dwarf Spheroidal Galaxy globular cluster system
|
| rightAscension | 18h 55m 03.3s ⓘ |
| skyLocation | near the center of the Sagittarius Dwarf Spheroidal Galaxy ⓘ |
| spectralType | integrated light dominated by old, metal-poor stars ⓘ |
| visibleFrom |
Southern Hemisphere
ⓘ
low northern latitudes ⓘ |
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: M54 Description of subject: M54 is a massive globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters discovered to reside outside the Milky Way in a satellite galaxy.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.