Messier 13
E918813
Messier 13 is a prominent globular star cluster in the constellation Hercules, renowned as one of the brightest and most studied such clusters in the northern sky.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Messier 13 canonical | 9 |
| globular cluster Messier 13 | 2 |
| globular cluster M13 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11317137 — 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 13 Context triple: [Great Hercules Cluster, alsoKnownAs, Messier 13]
-
A.
Messier 14
Messier 14 is a bright globular star cluster in the constellation Ophiuchus, composed of hundreds of thousands of ancient stars densely packed together.
-
B.
Messier 4
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.
-
C.
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.
-
D.
47 Tucanae
47 Tucanae is a massive, bright globular star cluster in the constellation Tucana, notable as one of the closest and most studied such clusters in the Milky Way.
-
E.
Messier 12
Messier 12 is a globular star cluster located in the constellation Ophiuchus, notable for its relatively loose structure and rich population of ancient 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: Messier 13 Target entity description: Messier 13 is a prominent globular star cluster in the constellation Hercules, renowned as one of the brightest and most studied such clusters in the northern sky.
-
A.
Messier 14
Messier 14 is a bright globular star cluster in the constellation Ophiuchus, composed of hundreds of thousands of ancient stars densely packed together.
-
B.
Messier 4
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.
-
C.
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.
-
D.
47 Tucanae
47 Tucanae is a massive, bright globular star cluster in the constellation Tucana, notable as one of the closest and most studied such clusters in the Milky Way.
-
E.
Messier 12
Messier 12 is a globular star cluster located in the constellation Ophiuchus, notable for its relatively loose structure and rich population of ancient stars.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
deep-sky object ⓘ globular star cluster ⓘ |
| age | about 11.5 billion years ⓘ |
| angularSize | about 20 arcminutes ⓘ |
| apparentMagnitudeV | 5.8 ⓘ |
| bestSeenFromHemisphere | Northern Hemisphere ⓘ |
| bestViewingSeason | late spring to summer ⓘ |
| cataloguedBy | Charles Messier ⓘ |
| catalogueInclusionYear | 1764 ⓘ |
| containsApproximateNumberOfStars | several hundred thousand ⓘ |
| containsStellarPopulation | Population II stars ⓘ |
| containsStellarType |
blue straggler stars
ⓘ
horizontal branch stars ⓘ red giant stars ⓘ |
| coreRadius | about 1.7 parsecs ⓘ |
| declination | +36° 28′ ⓘ |
| discoveredBy |
Edmond Halley
ⓘ
linked to:
Edmund Halley
|
| discoveryYear | 1714 ⓘ |
| distanceFromEarth |
about 22,000 light-years
ⓘ
about 6.8 kiloparsecs ⓘ |
| estimatedMass | about 600,000 solar masses ⓘ |
| featuredInMessage | Arecibo message target region ⓘ |
| galacticLatitude | +40.9° ⓘ |
| galacticLongitude | 59.0° ⓘ |
| halfLightRadius | about 3.4 parsecs ⓘ |
| hasAlternativeName |
Great Hercules Cluster
ⓘ
M13 ⓘ
linked to:
M 13
NGC 6205 ⓘ |
| hasNearbyObject |
IC 4617
ⓘ
NGC 6207 ⓘ |
| locatedIn |
Galactic halo
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Hercules ⓘ |
| messierNumber | 13 ⓘ |
| metallicityFeH | about −1.5 ⓘ |
| ngcNumber | 6205 ⓘ |
| notableFeature |
one of the brightest globular clusters in the northern sky
ⓘ
well-studied stellar population ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ ultraviolet ⓘ |
| rightAscension | 16h 41m ⓘ |
| skyLocationDescription | on the western side of the Keystone asterism in Hercules ⓘ |
| surfaceBrightness | high for a globular cluster ⓘ |
| visibility |
barely visible to the naked eye under dark skies
ⓘ
visible in small telescopes ⓘ |
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 13 Description of subject: Messier 13 is a prominent globular star cluster in the constellation Hercules, renowned as one of the brightest and most studied such clusters in the northern sky.
Referenced by (12)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Messier 13
linked to: Messier 13