Monoceros OB2 association
E450956
Monoceros OB2 association is a large stellar grouping in the constellation Monoceros, notable for its young, massive stars and active star-forming regions such as the Rosette Nebula.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Monoceros OB2 association canonical | 2 |
| Monoceros OB association (approximate large-scale grouping) | 1 |
| Monoceros star-forming complex | 1 |
| Monoceros star-forming region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4531502 — 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: Monoceros OB2 association Context triple: [Rosette Nebula, partOf, Monoceros OB2 association]
-
A.
Perseus OB2 association
Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
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B.
Scorpius–Centaurus OB association
The Scorpius–Centaurus OB association is the nearest large group of young, massive stars to the Sun, spanning the constellations Scorpius and Centaurus and playing a key role in studies of recent star formation in our Galactic neighborhood.
-
C.
Cassiopeia OB associations
The Cassiopeia OB associations are large groupings of young, massive, hot stars located in the direction of the constellation Cassiopeia within the Milky Way.
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D.
Perseus molecular cloud complex
The Perseus molecular cloud complex is a prominent nearby star-forming region rich in cold gas and dust, known for hosting numerous young stellar objects and protostars.
-
E.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
- 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: Monoceros OB2 association Target entity description: Monoceros OB2 association is a large stellar grouping in the constellation Monoceros, notable for its young, massive stars and active star-forming regions such as the Rosette Nebula.
-
A.
Perseus OB2 association
Perseus OB2 association is a nearby group of young, massive OB-type stars located in the Perseus constellation region of the Milky Way.
-
B.
Scorpius–Centaurus OB association
The Scorpius–Centaurus OB association is the nearest large group of young, massive stars to the Sun, spanning the constellations Scorpius and Centaurus and playing a key role in studies of recent star formation in our Galactic neighborhood.
-
C.
Cassiopeia OB associations
The Cassiopeia OB associations are large groupings of young, massive, hot stars located in the direction of the constellation Cassiopeia within the Milky Way.
-
D.
Perseus molecular cloud complex
The Perseus molecular cloud complex is a prominent nearby star-forming region rich in cold gas and dust, known for hosting numerous young stellar objects and protostars.
-
E.
Jewel Box cluster
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
OB association
ⓘ
stellar association ⓘ |
| age | a few million years ⓘ |
| associatedWith |
Rosette Molecular Cloud
ⓘ
linked to:
Rosette Nebula
active star formation ⓘ |
| constellation | Monoceros ⓘ |
| contains |
H II regions
ⓘ
NGC 2244 ⓘ OB-type stars ⓘ Rosette Nebula ⓘ early-type stars ⓘ embedded young stellar objects ⓘ molecular clouds ⓘ pre-main-sequence stars ⓘ young massive stars ⓘ |
| distanceFromEarth |
about 1.5 kiloparsecs
ⓘ
about 5000 light-years ⓘ |
| galacticLatitudeApprox | about -2 degrees ⓘ |
| galacticLongitudeApprox | about 206 degrees ⓘ |
| hasAlternativeName | Mon OB2 ⓘ |
| hasCharacteristic |
large spatial extent
ⓘ
loose stellar grouping ⓘ massive star formation ⓘ young stellar population ⓘ |
| hasMemberType |
B-type stars
ⓘ
Herbig Ae/Be stars ⓘ O-type stars ⓘ T Tauri stars ⓘ |
| hasRole |
laboratory for massive star formation studies
ⓘ
laboratory for triggered star formation studies ⓘ |
| hasSubregion | central cluster NGC 2244 ⓘ |
| ionizes | Rosette Nebula gas ⓘ |
| isPartOf | local spiral structure of the Milky Way ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Arm ⓘ |
| namedAfter | constellation Monoceros ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ radio wavelengths ⓘ |
| partOf |
Monoceros star-forming complex
ⓘ
linked to:
Monoceros OB2 association
|
| surrounds | Rosette Nebula cavity ⓘ |
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: Monoceros OB2 association Description of subject: Monoceros OB2 association is a large stellar grouping in the constellation Monoceros, notable for its young, massive stars and active star-forming regions such as the Rosette Nebula.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Monoceros OB2 association
linked to: Monoceros OB2 association
linked to: Monoceros OB2 association