Messier 22
E108044
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.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 22 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T869228 — 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 22 Context triple: [Sagittarius, contains, Messier 22]
-
A.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
-
B.
Messier 8
Messier 8, also known as the Lagoon Nebula, is a large, bright emission nebula and active star-forming region visible in the constellation Sagittarius.
-
C.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
-
D.
globular star cluster M13
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.
-
E.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
- 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 22 Target entity description: 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.
-
A.
Messier 20
Messier 20, also known as the Trifid Nebula, is a bright, star-forming emission and reflection nebula famous for its striking three-lobed appearance.
-
B.
Messier 8
Messier 8, also known as the Lagoon Nebula, is a large, bright emission nebula and active star-forming region visible in the constellation Sagittarius.
-
C.
NGC 6822
NGC 6822 is a barred irregular dwarf galaxy located in the constellation Sagittarius and is one of the nearest and best-studied galaxies outside the Milky Way.
-
D.
globular star cluster M13
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.
-
E.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | about −8.5 ⓘ |
| age | about 12 billion years ⓘ |
| alsoKnownAs |
M22
ⓘ
NGC 6656 ⓘ |
| angularSize | about 32 arcminutes ⓘ |
| apparentMagnitudeV | 5.1 ⓘ |
| appearsNear |
Milky Way center
ⓘ
surface form:
Galactic center
|
| bestSeenIn | summer ⓘ |
| cataloguedBy | Charles Messier ⓘ |
| concentrationClass | VII ⓘ |
| contains |
blue straggler stars
ⓘ
millisecond pulsars ⓘ multiple black hole candidates ⓘ planetary nebula GJJC 1 ⓘ |
| coreRadius | about 1.3 arcminutes ⓘ |
| declination | −23° 54′ ⓘ |
| discoveredBy | Abraham Ihle ⓘ |
| discoveredInConstellation | Sagittarius ⓘ |
| discoveryYear | 1665 ⓘ |
| distanceFromEarth |
about 10,000 light-years
ⓘ
about 3,200 parsecs ⓘ |
| galacticLatitude | −7.55° ⓘ |
| galacticLongitude | 9.89° ⓘ |
| halfLightRadius | about 3.4 arcminutes ⓘ |
| hasColorIndexBminusV | about 0.73 ⓘ |
| locatedIn |
Scutum Star Cloud
ⓘ
surface form:
Galactic bulge region
|
| locatedInConstellation | Sagittarius ⓘ |
| locatedInGalaxy | Milky Way ⓘ |
| locatedNear | ecliptic ⓘ |
| mass | about 5×10^5 solar masses ⓘ |
| messierNumber | 22 ⓘ |
| metallicity | [Fe/H] ≈ −1.7 ⓘ |
| ngcNumber | 6656 ⓘ |
| notableFor |
being easily visible in small telescopes and binoculars
ⓘ
being one of the first globular clusters discovered ⓘ being one of the nearest globular clusters to Earth ⓘ |
| numberOfStars | several hundred thousand ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf | Milky Way globular cluster system ⓘ |
| rightAscension | 18h 36m ⓘ |
| visibleFrom |
Northern Celestial Hemisphere
ⓘ
surface form:
Northern Hemisphere
Southern Hemisphere ⓘ |
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 22 Description of subject: 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.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.