Orion Nebula Cluster
E514712
The Orion Nebula Cluster is a dense, young star cluster embedded within the Orion Nebula, notable as one of the nearest and most studied regions of active star formation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Orion Nebula Cluster canonical | 4 |
| Theta1 Orionis cluster | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5362885 — 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: Orion Nebula Cluster Context triple: [Orion Nebula, hostTo, Orion Nebula Cluster]
-
A.
σ Orionis cluster
The σ Orionis cluster is a young, compact star cluster in the Orion constellation, notable for its massive central multiple star system and role in illuminating and shaping the surrounding Orion Molecular Cloud Complex.
-
B.
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.
-
C.
Beti-Fang cluster
The Beti-Fang cluster is a group of closely related Bantu languages spoken primarily in Cameroon, Equatorial Guinea, and neighboring Central African regions.
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D.
NGC 1333
NGC 1333 is a nearby, active star-forming nebula rich in young stellar objects and reflection nebulosity, located in the Perseus constellation.
-
E.
NGC 6231
NGC 6231 is a bright, young open star cluster located near the tail of the constellation Scorpius, notable for its massive, hot stars and role as the core of the Scorpius OB1 association.
- 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: Orion Nebula Cluster Target entity description: The Orion Nebula Cluster is a dense, young star cluster embedded within the Orion Nebula, notable as one of the nearest and most studied regions of active star formation.
-
A.
σ Orionis cluster
The σ Orionis cluster is a young, compact star cluster in the Orion constellation, notable for its massive central multiple star system and role in illuminating and shaping the surrounding Orion Molecular Cloud Complex.
-
B.
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.
-
C.
Beti-Fang cluster
The Beti-Fang cluster is a group of closely related Bantu languages spoken primarily in Cameroon, Equatorial Guinea, and neighboring Central African regions.
-
D.
NGC 1333
NGC 1333 is a nearby, active star-forming nebula rich in young stellar objects and reflection nebulosity, located in the Perseus constellation.
-
E.
NGC 6231
NGC 6231 is a bright, young open star cluster located near the tail of the constellation Scorpius, notable for its massive, hot stars and role as the core of the Scorpius OB1 association.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
embedded cluster
ⓘ
open star cluster ⓘ young stellar cluster ⓘ |
| age | about 1 million years ⓘ |
| ageRange | less than 3 million years ⓘ |
| alsoKnownAs |
ONC
ⓘ
Trapezium Cluster ⓘ |
| centralStarsDesignation | Theta1 Orionis ⓘ |
| containsApproximateNumberOfStars |
about 2000
ⓘ
between 2000 and 4000 ⓘ |
| containsObject |
B-type stars
ⓘ
Herbig–Haro objects ⓘ T Tauri stars ⓘ Trapezium stars ⓘ brown dwarfs ⓘ dust ⓘ ionized gas ⓘ massive O-type stars ⓘ molecular gas ⓘ protoplanetary disks ⓘ |
| distanceFromEarth |
about 1350 light-years
ⓘ
about 414 parsecs ⓘ |
| hasAngularSize | about 20 arcminutes ⓘ |
| hasCoreRegion | Trapezium ⓘ |
| hasInitialMassFunction | well-studied initial mass function ⓘ |
| hasMass | several thousand solar masses ⓘ |
| hasProperty |
contains many pre-main-sequence stars
ⓘ
mass-segregated ⓘ rich in circumstellar disks ⓘ strong nebular emission ⓘ |
| hasStellarDensity | high central stellar density ⓘ |
| ionizedBy | Theta1 Orionis C ⓘ |
| isEmbeddedIn |
H II region
ⓘ
giant molecular cloud ⓘ |
| isOneOf |
best-studied young clusters
ⓘ
nearest massive star-forming regions to Earth ⓘ |
| isRegionOf | active star formation ⓘ |
| locatedIn |
Orion Molecular Cloud Complex
ⓘ
Orion Nebula ⓘ |
| locatedInConstellation | Orion ⓘ |
| observedBy |
Chandra X-ray Observatory
ⓘ
Hubble Space Telescope ⓘ Spitzer Space Telescope ⓘ Very Large Telescope ⓘ |
| observedInWavelength |
X-ray
ⓘ
infrared ⓘ optical ⓘ |
| partOf |
Orion A molecular cloud
ⓘ
linked to:
Orion Molecular Cloud Complex
|
| usedAs |
benchmark for pre-main-sequence evolution models
ⓘ
laboratory for star formation studies ⓘ |
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: Orion Nebula Cluster Description of subject: The Orion Nebula Cluster is a dense, young star cluster embedded within the Orion Nebula, notable as one of the nearest and most studied regions of active star formation.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Orion Nebula Cluster