globular star cluster M13
E54486
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Messier 13 | 3 |
| globular star cluster M13 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T432768 — 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: globular star cluster M13 Context triple: [Arecibo message, target, globular star cluster M13]
-
A.
Triangulum Galaxy
The Triangulum Galaxy is a nearby spiral galaxy in the Local Group, notable as one of the closest large galaxies to the Milky Way and a companion to the Andromeda Galaxy.
-
B.
Canis Major Dwarf Galaxy
The Canis Major Dwarf Galaxy is a nearby, faint irregular dwarf galaxy thought to be the closest known satellite galaxy to the Milky Way and currently being tidally disrupted by it.
-
C.
Milky Way center
The Milky Way center is the dense, energetic core of our galaxy, hosting a supermassive black hole surrounded by stars, gas, and dust.
-
D.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
E.
Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
- 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: globular star cluster M13 Target entity description: Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
-
A.
Triangulum Galaxy
The Triangulum Galaxy is a nearby spiral galaxy in the Local Group, notable as one of the closest large galaxies to the Milky Way and a companion to the Andromeda Galaxy.
-
B.
Canis Major Dwarf Galaxy
The Canis Major Dwarf Galaxy is a nearby, faint irregular dwarf galaxy thought to be the closest known satellite galaxy to the Milky Way and currently being tidally disrupted by it.
-
C.
Milky Way center
The Milky Way center is the dense, energetic core of our galaxy, hosting a supermassive black hole surrounded by stars, gas, and dust.
-
D.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
E.
Sagittarius Dwarf Spheroidal Galaxy
The Sagittarius Dwarf Spheroidal Galaxy is a small, elongated satellite galaxy currently being tidally disrupted and absorbed by the Milky Way.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ deep-sky object ⓘ globular star cluster ⓘ |
| age | about 11.5 billion years ⓘ |
| alsoKnownAs |
Great Hercules Cluster
ⓘ
M 13 ⓘ globular star cluster M13 ⓘ
surface form:
Messier 13
NGC 6205 ⓘ |
| angularSize | about 20 arcminutes ⓘ |
| apparentMagnitudeV | 5.8 ⓘ |
| bestSeenFromLatitude | mid-northern latitudes ⓘ |
| bestSeenIn |
spring
ⓘ
summer ⓘ |
| cataloguedBy | Charles Messier ⓘ |
| catalogueInclusionYear | 1764 ⓘ |
| contains |
RR Lyrae variable stars
ⓘ
blue straggler stars ⓘ horizontal branch stars ⓘ millisecond pulsars ⓘ multiple stellar populations ⓘ red giant stars ⓘ |
| coreRadius | about 1.7 parsecs ⓘ |
| declination | +36° 28′ ⓘ |
| diameter | about 145 light-years ⓘ |
| discoveredBy |
Edmund Halley
ⓘ
surface form:
Edmond Halley
|
| discoveryYear | 1714 ⓘ |
| distanceFromEarth |
about 22,000 light-years
ⓘ
about 6.8 kiloparsecs ⓘ |
| galacticLatitude | about +40° ⓘ |
| galacticLongitude | about 59° ⓘ |
| halfLightRadius | about 3.5 parsecs ⓘ |
| isNakedEyeObject | yes, under dark skies ⓘ |
| isPopularFor |
amateur astronomy observations
ⓘ
astrophotography ⓘ |
| isVisibleFrom | Northern Hemisphere ⓘ |
| locatedIn |
Milky Way stellar halo
ⓘ
surface form:
Galactic halo
Milky Way ⓘ |
| locatedInConstellation | Hercules ⓘ |
| mass | about 600,000 solar masses ⓘ |
| MessierNumber | 13 ⓘ |
| metallicity | [Fe/H] ≈ −1.5 ⓘ |
| NGCNumber | 6205 ⓘ |
| notableEvent | Arecibo message beamed toward M13 in 1974 ⓘ |
| numberOfStars |
on the order of 300,000
ⓘ
several hundred thousand ⓘ |
| observedBy |
Arecibo Observatory
ⓘ
Hubble Space Telescope ⓘ |
| rightAscension | 16h 41m ⓘ |
| ShapleySawyerConcentrationClass | V ⓘ |
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: globular star cluster M13 Description of subject: Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
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:
Messier 13
this entity surface form:
Messier 13
this entity surface form:
Messier 13