Messier 19
E482188
Messier 19 is a highly elongated globular star cluster located in the constellation Ophiuchus, notable for being one of the most oblate known globular clusters in the Milky Way.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 19 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4911778 — 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 19 Context triple: [Ophiuchus, containsDeepSkyObject, Messier 19]
-
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 26
Messier 26 is an open star cluster located in the constellation Scutum, notable for its relatively compact grouping of stars and moderate brightness.
-
D.
Messier 28
Messier 28 is a dense globular star cluster located in the constellation Sagittarius, composed of hundreds of thousands of ancient stars.
-
E.
Messier 21
Messier 21 is a young open star cluster in the constellation Sagittarius, notable for its bright, densely packed hot stars and proximity to the Trifid Nebula.
- 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 19 Target entity description: Messier 19 is a highly elongated globular star cluster located in the constellation Ophiuchus, notable for being one of the most oblate known globular clusters in the Milky Way.
-
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 26
Messier 26 is an open star cluster located in the constellation Scutum, notable for its relatively compact grouping of stars and moderate brightness.
-
D.
Messier 28
Messier 28 is a dense globular star cluster located in the constellation Sagittarius, composed of hundreds of thousands of ancient stars.
-
E.
Messier 21
Messier 21 is a young open star cluster in the constellation Sagittarius, notable for its bright, densely packed hot stars and proximity to the Trifid Nebula.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
NGC object ⓘ astronomical object ⓘ globular star cluster ⓘ |
| absoluteMagnitudeV | −9.2 (approx) ⓘ |
| angularSize | 17 arcminutes (approx) ⓘ |
| apparentMagnitudeV | 6.8 ⓘ |
| belongsTo |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| catalogCode |
GCl 45
NERFINISHED
ⓘ
M19 NERFINISHED ⓘ Messier 19 NERFINISHED ⓘ NGC 6273 NERFINISHED ⓘ |
| coreRadius | about 0.7 arcminutes ⓘ |
| declination | −26° 16′ (approx) ⓘ |
| discoveredBy | Charles Messier NERFINISHED ⓘ |
| discoveryDate | 1764 ⓘ |
| distanceFromEarth | 28000 light-years (approx) ⓘ |
| distanceFromGalacticCenter | 6500 light-years (approx) ⓘ |
| ellipticity | high compared to typical globular clusters ⓘ |
| galacticLatitude | +6.0° (approx) ⓘ |
| galacticLongitude | +356.9° (approx) ⓘ |
| halfLightRadius | about 1.3 arcminutes ⓘ |
| hasShape | elliptical ⓘ |
| hasStellarPopulation | Population II stars ⓘ |
| hostGalaxy | Milky Way NERFINISHED ⓘ |
| isAffectedBy | interstellar extinction ⓘ |
| isHighlyElongated | true ⓘ |
| isIncludedIn | Harris catalogue of globular clusters NERFINISHED ⓘ |
| isLocatedNear | Galactic center NERFINISHED ⓘ |
| isOblate | true ⓘ |
| isObservedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| isOneOfMostOblateGlobularClustersIn | Milky Way NERFINISHED ⓘ |
| isPartOf | Milky Way globular cluster system NERFINISHED ⓘ |
| isRichIn | old, metal-poor stars ⓘ |
| isVisibleFromEarthWith | binoculars under dark skies ⓘ |
| locatedIn |
Galactic bulge region
NERFINISHED
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Ophiuchus NERFINISHED ⓘ |
| mass | about 1.1×10^6 solar masses ⓘ |
| metallicityFeH | −1.5 (approx) ⓘ |
| rightAscension | 17h 02m (approx) ⓘ |
| showsDifferentialReddening | true ⓘ |
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 19 Description of subject: Messier 19 is a highly elongated globular star cluster located in the constellation Ophiuchus, notable for being one of the most oblate known globular clusters in the Milky Way.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.