Messier 4
E473829
Messier 4 is a bright, nearby globular star cluster located in the constellation Scorpius and is one of the easiest globular clusters to observe with small telescopes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4835394 — 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 4 Context triple: [Scorpius, containsDeepSkyObject, Messier 4]
-
A.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
B.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
C.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
D.
Messier 45
Messier 45, commonly known as the Pleiades, is a prominent open star cluster in the constellation Taurus, easily visible to the naked eye and famous in many cultures worldwide.
-
E.
Messier 11
Messier 11 is a rich, compact open star cluster in the constellation Scutum, notable for its high stellar density and nickname "the Wild Duck Cluster."
- 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 4 Target entity description: Messier 4 is a bright, nearby globular star cluster located in the constellation Scorpius and is one of the easiest globular clusters to observe with small telescopes.
-
A.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
B.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
C.
Messier 22
Messier 22 is a bright globular star cluster located near the center of the Milky Way, visible in the constellation Sagittarius and notable for being one of the closest and most easily observed clusters of its kind.
-
D.
Messier 45
Messier 45, commonly known as the Pleiades, is a prominent open star cluster in the constellation Taurus, easily visible to the naked eye and famous in many cultures worldwide.
-
E.
Messier 11
Messier 11 is a rich, compact open star cluster in the constellation Scutum, notable for its high stellar density and nickname "the Wild Duck Cluster."
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | about −7.2 ⓘ |
| age | about 12 billion years ⓘ |
| angularSize | 26 arcminutes ⓘ |
| apparentMagnitudeV | 5.6 ⓘ |
| bestSeenInMonth | June ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| contains |
RR Lyrae variable stars
ⓘ
blue straggler stars ⓘ millisecond pulsars ⓘ pulsars ⓘ white dwarfs ⓘ |
| coreRadius | about 0.53 parsecs ⓘ |
| declination | −26° 32′ ⓘ |
| discoveredBy | Philippe Loys de Chéseaux NERFINISHED ⓘ |
| discoveryYear | 1746 ⓘ |
| distanceFromEarth |
about 2.2 kiloparsecs
ⓘ
about 6,000 light-years ⓘ |
| distanceFromGalacticCenter | about 5.9 kiloparsecs ⓘ |
| easilyResolvedWith | small telescopes ⓘ |
| galacticPopulation | Population II ⓘ |
| halfLightRadius | about 2.3 parsecs ⓘ |
| hasCentralBarStructure | yes ⓘ |
| hasDesignation |
M4
NERFINISHED
ⓘ
NGC 6121 NERFINISHED ⓘ |
| hasNotableObject |
PSR B1620−26
NERFINISHED
ⓘ
PSR B1620−26 b NERFINISHED ⓘ |
| isOneOfNearestGlobularClusters | yes ⓘ |
| locatedInConstellation | Scorpius NERFINISHED ⓘ |
| locatedInDirectionOf | Scorpius tail region NERFINISHED ⓘ |
| locatedInGalacticComponent | inner halo ⓘ |
| locatedInGalaxy | Milky Way NERFINISHED ⓘ |
| mass | about 1.6×10^5 solar masses ⓘ |
| messierNumber | 4 ⓘ |
| metallicityFeH | about −1.1 ⓘ |
| nearbyBrightStar | Antares NERFINISHED ⓘ |
| observedBy | Hubble Space Telescope NERFINISHED ⓘ |
| observedFromHemisphere |
Southern Hemisphere
NERFINISHED
ⓘ
low northern latitudes ⓘ |
| rankByDistance | among closest globular clusters to Earth ⓘ |
| rightAscension | 16h 23m ⓘ |
| separationFromAntares | about 1.3 degrees ⓘ |
| tidalRadius | about 32.5 parsecs ⓘ |
| usedForStudyOf |
stellar evolution in low metallicity environments
ⓘ
white dwarf cooling sequences ⓘ |
| visibilityToNakedEye | visible 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: Messier 4 Description of subject: Messier 4 is a bright, nearby globular star cluster located in the constellation Scorpius and is one of the easiest globular clusters to observe with small telescopes.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.