Messier 73
E870792
Messier 73 is a small asterism of four stars in the constellation Aquarius that was historically cataloged as a deep-sky object by Charles Messier.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 73 canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T10489010 — 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 73 Context triple: [Aquarius, containsDeepSkyObject, Messier 73]
-
A.
Messier 72
Messier 72 is a distant, relatively faint globular star cluster located in the constellation Aquarius.
-
B.
Messier 75
Messier 75 is a densely concentrated globular star cluster located in the constellation Sagittarius, notable for its great distance from Earth and rich population of ancient stars.
-
C.
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.
-
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 70
Messier 70 is a dense globular star cluster located in the constellation Sagittarius near the center of the Milky Way 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 73 Target entity description: Messier 73 is a small asterism of four stars in the constellation Aquarius that was historically cataloged as a deep-sky object by Charles Messier.
-
A.
Messier 72
Messier 72 is a distant, relatively faint globular star cluster located in the constellation Aquarius.
-
B.
Messier 75
Messier 75 is a densely concentrated globular star cluster located in the constellation Sagittarius, notable for its great distance from Earth and rich population of ancient stars.
-
C.
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.
-
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 70
Messier 70 is a dense globular star cluster located in the constellation Sagittarius near the center of the Milky Way galaxy.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
asterism
ⓘ
astronomical object ⓘ |
| angularSize | 2.8 arcminutes ⓘ |
| apparentMagnitudeV | 9.0 ⓘ |
| appearsNear |
Messier 72
ⓘ
Saturn Nebula ⓘ |
| bestSeenFrom | Northern Hemisphere ⓘ |
| bestSeenIn | autumn ⓘ |
| catalogCode |
M73
ⓘ
NGC 6994 ⓘ |
| cataloguedIn |
Messier Catalogue
ⓘ
linked to:
Messier catalogue
New General Catalogue ⓘ |
| contains | four visually close stars ⓘ |
| currentClassification | asterism ⓘ |
| declination | −12° 38′ 06″ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| discoveryDate | 1780 ⓘ |
| distanceFromEarth | about 2,500 light-years ⓘ |
| galacticLatitude | −34.0° ⓘ |
| galacticLongitude | 35.1° ⓘ |
| historicallyClassifiedAs | open cluster ⓘ |
| includedIn | deep-sky observing lists ⓘ |
| isNot | gravitationally bound star cluster ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ |
| locatedInConstellation | Aquarius ⓘ |
| numberOfMainStars | 4 ⓘ |
| observedWith | small telescope ⓘ |
| rightAscension | 20h 58m 56s ⓘ |
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 73 Description of subject: Messier 73 is a small asterism of four stars in the constellation Aquarius that was historically cataloged as a deep-sky object by Charles Messier.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.