NGC 2345
E570035
NGC 2345 is an open star cluster located in the constellation Monoceros, notable for its young, massive stars and rich stellar population.
All labels observed (2)
| Label | Occurrences |
|---|---|
| NGC 2345 canonical | 1 |
| open cluster NGC 2345 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5775493 — 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: NGC 2345 Context triple: [Monoceros, contains, NGC 2345]
-
A.
NGC 2343
NGC 2343 is an open star cluster located in the constellation Monoceros.
-
B.
NGC 2301
NGC 2301 is a bright open star cluster located in the constellation Monoceros, known for its rich population of young, blue stars.
-
C.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
D.
NGC 2360
NGC 2360 is an open star cluster in the constellation Canis Major, notable for its rich population of moderately aged stars.
-
E.
NGC 2232
NGC 2232 is an open star cluster located in the constellation Monoceros, notable for its relatively young, bright stars.
- 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: NGC 2345 Target entity description: NGC 2345 is an open star cluster located in the constellation Monoceros, notable for its young, massive stars and rich stellar population.
-
A.
NGC 2343
NGC 2343 is an open star cluster located in the constellation Monoceros.
-
B.
NGC 2301
NGC 2301 is a bright open star cluster located in the constellation Monoceros, known for its rich population of young, blue stars.
-
C.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
D.
NGC 2360
NGC 2360 is an open star cluster in the constellation Canis Major, notable for its rich population of moderately aged stars.
-
E.
NGC 2232
NGC 2232 is an open star cluster located in the constellation Monoceros, notable for its relatively young, bright stars.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| age | ~60 million years ⓘ |
| angularSize | ~7 arcminutes ⓘ |
| apparentMagnitudeV | ~8.9 ⓘ |
| catalog | New General Catalogue ⓘ |
| clusterMass | several thousand solar masses ⓘ |
| colorExcessE(B−V) | ~0.6 ⓘ |
| constellation | Monoceros ⓘ |
| declination | -13° 11′ ⓘ |
| discoveredBy | William Herschel ⓘ |
| discoveryDate | 1785 ⓘ |
| distanceFromEarth |
~3.0 kiloparsecs
ⓘ
~9800 light-years ⓘ |
| galacticLatitude | −2.3° ⓘ |
| galacticLongitude | 226.6° ⓘ |
| hasFeature |
differential reddening
ⓘ
evolved giant stars ⓘ prominent main sequence ⓘ rich stellar population ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ |
| metallicity | subsolar ⓘ |
| rightAscension | 07h 08m ⓘ |
| stellarPopulation |
B-type stars
ⓘ
massive stars ⓘ red supergiants ⓘ young stars ⓘ |
| usedFor |
studies of Galactic metallicity gradient
ⓘ
studies of massive star evolution ⓘ studies of stellar evolution ⓘ |
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: NGC 2345 Description of subject: NGC 2345 is an open star cluster located in the constellation Monoceros, notable for its young, massive stars and rich stellar population.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.