open cluster NGC 2244
E450955
Open cluster NGC 2244 is a young, bright star cluster whose hot, massive stars illuminate and sculpt the surrounding Rosette Nebula in the constellation Monoceros.
All labels observed (1)
| Label | Occurrences |
|---|---|
| open cluster NGC 2244 canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T4531466 — 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: open cluster NGC 2244 Context triple: [Rosette Nebula, hasCentralObject, open cluster NGC 2244]
-
A.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
B.
Open cluster NGC 6530
Open cluster NGC 6530 is a young, bright star cluster embedded in the Lagoon Nebula in the constellation Sagittarius, serving as a prominent site of active star formation within the Milky Way.
-
C.
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.
-
D.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
E.
NGC 7320
NGC 7320 is a foreground spiral galaxy in the constellation Pegasus that appears as part of Stephan’s Quintet but is actually much closer to Earth than the other members.
- 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: open cluster NGC 2244 Target entity description: Open cluster NGC 2244 is a young, bright star cluster whose hot, massive stars illuminate and sculpt the surrounding Rosette Nebula in the constellation Monoceros.
-
A.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
B.
Open cluster NGC 6530
Open cluster NGC 6530 is a young, bright star cluster embedded in the Lagoon Nebula in the constellation Sagittarius, serving as a prominent site of active star formation within the Milky Way.
-
C.
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.
-
D.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
E.
NGC 7320
NGC 7320 is a foreground spiral galaxy in the constellation Pegasus that appears as part of Stephan’s Quintet but is actually much closer to Earth than the other members.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
deep-sky object ⓘ open star cluster ⓘ |
| age |
about 1–6 million years
ⓘ
young star cluster ⓘ |
| angularSize | about 24 arcminutes ⓘ |
| apparentMagnitudeV | about 4.8 ⓘ |
| associatedWith | Rosette Nebula ⓘ |
| bestSeenFrom | Northern Hemisphere ⓘ |
| bestViewingSeason | winter ⓘ |
| catalog | New General Catalogue ⓘ |
| containsNotableStar |
HD 46150
ⓘ
HD 46223 ⓘ |
| containsStarsOfType |
B-type stars
ⓘ
O-type stars ⓘ hot, blue stars ⓘ massive stars ⓘ |
| creates | central cavity in Rosette Nebula ⓘ |
| declination | +04° 56′ ⓘ |
| discoveredBy | John Flamsteed ⓘ |
| discoveryYear | before 1690 ⓘ |
| distanceFromEarth |
about 1,600 parsecs
ⓘ
about 5,200 light-years ⓘ |
| embeddedIn | Rosette Nebula ⓘ |
| galacticLatitude | about -2° ⓘ |
| galacticLongitude | about 206° ⓘ |
| hasApproximateRadius | about 10–15 light-years ⓘ |
| hasClusterCore | loose, centrally concentrated ⓘ |
| hasStellarPopulation |
main-sequence stars
ⓘ
pre-main-sequence stars ⓘ |
| ionizes | Rosette Nebula gas ⓘ |
| locatedIn |
Galactic disk
ⓘ
Milky Way ⓘ Orion Arm ⓘ |
| locatedInConstellation | Monoceros ⓘ |
| observedInWavelength |
X-ray
ⓘ
infrared ⓘ optical ⓘ |
| otherName |
Caldwell 50
ⓘ
linked to:
Caldwell 49
|
| partOf |
Rosette star-forming region
ⓘ
linked to:
Rosette Nebula
|
| rightAscension | 06h 31m ⓘ |
| sculpts | Rosette Nebula cavity ⓘ |
| stellarWindEffect | clears gas and dust from cluster center ⓘ |
| stellarWindFrom | O-type stars ⓘ |
| visibleWith |
binoculars
ⓘ
small telescope ⓘ |
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: open cluster NGC 2244 Description of subject: Open cluster NGC 2244 is a young, bright star cluster whose hot, massive stars illuminate and sculpt the surrounding Rosette Nebula in the constellation Monoceros.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.