Messier 24
E110247
Messier 24 is a rich star cloud in the constellation Sagittarius, representing a dense, bright section of the Milky Way visible through a gap in interstellar dust.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Messier 24 canonical | 4 |
| Sagittarius constellation region near M24 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T869229 — 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 24 Context triple: [Sagittarius, contains, Messier 24]
-
A.
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.
-
B.
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.
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C.
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.
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D.
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.
-
E.
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.
- 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 24 Target entity description: Messier 24 is a rich star cloud in the constellation Sagittarius, representing a dense, bright section of the Milky Way visible through a gap in interstellar dust.
-
A.
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.
-
B.
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.
-
C.
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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
Milky Way star cloud
ⓘ
astronomical object ⓘ deep-sky object ⓘ star cloud ⓘ |
| alsoKnownAs |
M24
ⓘ
Sagittarius Star Cloud ⓘ |
| angularSize | approximately 95 arcminutes ⓘ |
| apparentMagnitudeV | 4.6 ⓘ |
| appearsAs | bright patch of unresolved starlight ⓘ |
| bestSeenFrom | southern hemisphere ⓘ |
| bestSeenIn | summer months ⓘ |
| catalogCode | M24 ⓘ |
| catalogDesignation | IC 4715 ⓘ |
| catalogNumber | Messier 24 ⓘ |
| composition |
interstellar dust
ⓘ
interstellar gas ⓘ mainly main-sequence stars ⓘ |
| constellation | Sagittarius ⓘ |
| contains |
dark nebulae
ⓘ
emission nebulae ⓘ numerous foreground stars ⓘ open clusters ⓘ reflection nebulae ⓘ |
| declination | −18° 29′ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| distanceFromEarth |
about 10,000 light-years
ⓘ
about 3,000 parsecs ⓘ |
| feature |
bright section of the Milky Way
ⓘ
dense star field ⓘ foreground window through interstellar dust ⓘ |
| galacticStructure | Sagittarius Arm ⓘ |
| locatedIn |
Milky Way
ⓘ
Sagittarius constellation region rich in Milky Way star fields ⓘ direction of the Galactic Center ⓘ |
| not | not a single physical cluster ⓘ |
| observedWith |
binoculars
ⓘ
small telescopes ⓘ |
| observingNote |
appears granular in small telescopes
ⓘ
requires low magnification for full extent ⓘ |
| partOfCatalog | Messier catalogue ⓘ |
| regionType | stellar field ⓘ |
| rightAscension | 18h 17m ⓘ |
| separationFromGalacticPlane | near the Galactic plane ⓘ |
| type | star cloud in the Milky Way disk ⓘ |
| visibility | visible to the naked eye under dark skies ⓘ |
| visibleIn | optical wavelengths ⓘ |
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 24 Description of subject: Messier 24 is a rich star cloud in the constellation Sagittarius, representing a dense, bright section of the Milky Way visible through a gap in interstellar dust.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.