M 13
E267996
M 13 is a globular star cluster in the constellation Hercules and one of the brightest and best-known such clusters in the northern sky.
All labels observed (2)
How this entity was disambiguated
This entity first appeared as the object of triple T2458996 — 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: M 13 Context triple: [M13, alsoKnownAs, M 13]
-
A.
M1
M1 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across the city’s waters.
-
B.
M1
M1 is the first and primary north–south metro line of the Warsaw Metro system in Poland.
-
C.
M3
M3 is a major motorway in the United Kingdom that connects London to Southampton, serving as a key route through southern England.
-
D.
M3
M3 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across the city’s lake or waterways.
-
E.
M11
M11 is a major motorway in England that connects London to Cambridge and the East Anglia region.
- 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: M 13 Target entity description: M 13 is a globular star cluster in the constellation Hercules and one of the brightest and best-known such clusters in the northern sky.
-
A.
M1
M1 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across the city’s waters.
-
B.
M1
M1 is the first and primary north–south metro line of the Warsaw Metro system in Poland.
-
C.
M-14
M-14 is a state highway in southeastern Michigan that serves as a major commuter route connecting Ann Arbor with the western suburbs of the Detroit metropolitan area.
-
D.
M3
M3 is a major motorway in the United Kingdom that connects London to Southampton, serving as a key route through southern England.
-
E.
M3
M3 is a boat line that operates as part of Geneva’s public transport network, providing passenger service across the city’s lake or waterways.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | about −8.6 ⓘ |
| age |
about 11.7 billion years
ⓘ
on the order of 12 billion years ⓘ |
| angularSize | about 20 arcminutes ⓘ |
| apparentMagnitudeV | 5.8 ⓘ |
| belongsToCatalog |
Caldwell catalogue
ⓘ
surface form:
Caldwell Catalogue
Messier catalogue ⓘ
surface form:
Messier Catalogue
New General Catalogue ⓘ |
| bestSeenFromHemisphere | Northern Hemisphere ⓘ |
| bestViewingSeason |
northern spring
ⓘ
northern summer ⓘ |
| caldwellNumber | C 47 ⓘ |
| cataloguedBy | Charles Messier ⓘ |
| concentrationClass | V ⓘ |
| coreRadius | about 1.7 parsecs ⓘ |
| declination | +36° 28′ ⓘ |
| discoveredBy |
Edmund Halley
ⓘ
surface form:
Edmond Halley
|
| discoveryYear | 1714 ⓘ |
| distanceFromEarth |
about 22,000 light-years
ⓘ
about 6.8 kiloparsecs ⓘ |
| galacticLatitude | +40.9° ⓘ |
| galacticLongitude | 59.0° ⓘ |
| halfLightRadius | about 3.3 parsecs ⓘ |
| hasDesignation |
Great Hercules Cluster
ⓘ
M13 ⓘ Messier 13 ⓘ NGC 6205 ⓘ |
| hasNearbyGalaxy |
IC 4617
ⓘ
NGC 6207 ⓘ |
| locatedIn |
Milky Way
ⓘ
Milky Way stellar halo ⓘ
surface form:
Milky Way halo
|
| locatedInConstellation | Hercules ⓘ |
| mass | about 600,000 solar masses ⓘ |
| messierNumber | 13 ⓘ |
| metallicityFeH | about −1.5 ⓘ |
| ngcNumber | 6205 ⓘ |
| notableFeature |
one of the brightest globular clusters in the northern sky
ⓘ
resolves into stars in small telescopes ⓘ |
| numberOfStars |
on the order of 300,000
ⓘ
several hundred thousand ⓘ |
| observedInWavelength |
X-ray
ⓘ
optical ⓘ ultraviolet ⓘ |
| rightAscension | 16h 41m ⓘ |
| visibleToNakedEye | yes ⓘ |
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: M 13 Description of subject: M 13 is a globular star cluster in the constellation Hercules and one of the brightest and best-known such clusters in the northern sky.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
M13
this entity surface form:
M13
this entity surface form:
M13
this entity surface form:
M13