Messier 72
E869020
Messier 72 is a distant, relatively faint globular star cluster located in the constellation Aquarius.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 72 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10489009 — 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: Messier 72 Context triple: [Aquarius, containsDeepSkyObject, Messier 72]
-
A.
Messier 75
Messier 75 is a densely concentrated globular star cluster located in the constellation Sagittarius, notable for its great distance from Earth and rich population of ancient stars.
-
B.
Messier 21
Messier 21 is a young open star cluster in the constellation Sagittarius, notable for its bright, densely packed hot stars and proximity to the Trifid Nebula.
-
C.
Messier 28
Messier 28 is a dense globular star cluster located in the constellation Sagittarius, composed of hundreds of thousands of ancient stars.
-
D.
Messier 62
Messier 62 is a bright, densely concentrated globular star cluster located in the constellation Ophiuchus, notable for its rich stellar population and asymmetrical appearance.
-
E.
Messier 26
Messier 26 is an open star cluster located in the constellation Scutum, notable for its relatively compact grouping of stars and moderate brightness.
- 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: Messier 72 Target entity description: Messier 72 is a distant, relatively faint globular star cluster located in the constellation Aquarius.
-
A.
Messier 75
Messier 75 is a densely concentrated globular star cluster located in the constellation Sagittarius, notable for its great distance from Earth and rich population of ancient stars.
-
B.
Messier 21
Messier 21 is a young open star cluster in the constellation Sagittarius, notable for its bright, densely packed hot stars and proximity to the Trifid Nebula.
-
C.
Messier 28
Messier 28 is a dense globular star cluster located in the constellation Sagittarius, composed of hundreds of thousands of ancient stars.
-
D.
Messier 62
Messier 62 is a bright, densely concentrated globular star cluster located in the constellation Ophiuchus, notable for its rich stellar population and asymmetrical appearance.
-
E.
Messier 26
Messier 26 is an open star cluster located in the constellation Scutum, notable for its relatively compact grouping of stars and moderate brightness.
- F. None of above. chosen
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf | globular cluster ⓘ |
| absoluteMagnitudeV | −7.31 ⓘ |
| addedToMessierCatalogueBy | Charles Messier NERFINISHED ⓘ |
| age | ~9.5 billion years ⓘ |
| angularSize | 6.0 arcminutes ⓘ |
| apparentMagnitudeV | 9.3 ⓘ |
| belongsToCatalogue |
Messier Catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| bestSeenWith | medium-sized telescope ⓘ |
| catalogCode |
M72
NERFINISHED
ⓘ
NGC 6981 NERFINISHED ⓘ |
| coreRadius | ~0.72 arcminutes ⓘ |
| declination | −12° 32′ 14″ ⓘ |
| discoveredBy | Pierre Méchain NERFINISHED ⓘ |
| discoveryDate | 1780-08-29 ⓘ |
| distanceFromEarth |
~16.7 kiloparsecs
ⓘ
~54,600 light-years ⓘ |
| equatorialCoordinateSystem | J2000 ⓘ |
| galacticLatitude | −27.60° ⓘ |
| galacticLongitude | 35.16° ⓘ |
| halfLightRadius | ~1.65 arcminutes ⓘ |
| hasAlternateName |
M 72
NERFINISHED
ⓘ
NGC 6981 NERFINISHED ⓘ |
| hasNearbyObjectOnSky | Messier 73 NERFINISHED ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| isDistantGlobularCluster | true ⓘ |
| isRelativelyFaint | true ⓘ |
| locatedIn | Milky Way halo NERFINISHED ⓘ |
| locatedInConstellation | Aquarius NERFINISHED ⓘ |
| messierCatalogueEntryYear | 1780 ⓘ |
| metallicityFeH | −1.54 ⓘ |
| observedBestIn | September ⓘ |
| rightAscension | 20h 53m 27s ⓘ |
| shapleySawyerConcentrationClass | IX ⓘ |
| surfaceBrightness | low ⓘ |
| visibleFromHemisphere |
Northern Hemisphere
NERFINISHED
ⓘ
Southern Hemisphere NERFINISHED ⓘ |
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: Messier 72 Description of subject: Messier 72 is a distant, relatively faint globular star cluster located in the constellation Aquarius.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.