NGC 2023 reflection nebula
E459027
NGC 2023 is a bright reflection nebula in the constellation Orion, illuminated by a young B-type star and noted for its complex dust structures and role in studies of star formation.
All labels observed (2)
| Label | Occurrences |
|---|---|
| NGC 2023 reflection nebula canonical | 1 |
| reflection nebula NGC 2023 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4617572 — 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 2023 reflection nebula Context triple: [Orion Molecular Cloud Complex, contains, NGC 2023 reflection nebula]
-
A.
Rosette Nebula
The Rosette Nebula is a large, circular emission nebula and active star-forming region located in the Milky Way, notable for its striking rose-like appearance in astrophotography.
-
B.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
C.
reflection nebula NGC 6726
Reflection nebula NGC 6726 is a bright, blue-tinged cloud of dust and gas illuminated by nearby young stars in the Corona Australis star-forming region.
-
D.
Trifid Nebula
The Trifid Nebula is a bright, star-forming emission and reflection nebula in the constellation Sagittarius, notable for its three-lobed appearance created by dark dust lanes.
-
E.
NGC 3132
NGC 3132 is a bright, elliptical planetary nebula in the constellation Vela, noted for its striking ring-like appearance and complex internal structure.
- 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 2023 reflection nebula Target entity description: NGC 2023 is a bright reflection nebula in the constellation Orion, illuminated by a young B-type star and noted for its complex dust structures and role in studies of star formation.
-
A.
Rosette Nebula
The Rosette Nebula is a large, circular emission nebula and active star-forming region located in the Milky Way, notable for its striking rose-like appearance in astrophotography.
-
B.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
C.
reflection nebula NGC 6726
Reflection nebula NGC 6726 is a bright, blue-tinged cloud of dust and gas illuminated by nearby young stars in the Corona Australis star-forming region.
-
D.
Trifid Nebula
The Trifid Nebula is a bright, star-forming emission and reflection nebula in the constellation Sagittarius, notable for its three-lobed appearance created by dark dust lanes.
-
E.
NGC 3132
NGC 3132 is a bright, elliptical planetary nebula in the constellation Vela, noted for its striking ring-like appearance and complex internal structure.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
nebula ⓘ reflection nebula ⓘ |
| angularSize | ~10 arcminutes ⓘ |
| catalog | New General Catalogue ⓘ |
| discoveredBy | William Herschel ⓘ |
| discoveryMethod | optical observation ⓘ |
| distanceFromEarth |
~1300 light-years
ⓘ
~400 parsecs ⓘ |
| hasCentralStar | HD 37903 ⓘ |
| hasDeclination | −02° 16′ ⓘ |
| hasDust | complex dust structures ⓘ |
| hasDustTemperature | ~50–80 K ⓘ |
| hasEnvironment | dense molecular cloud ⓘ |
| hasFeature |
infrared emission from dust
ⓘ
photodissociation region ⓘ polycyclic aromatic hydrocarbon emission ⓘ reflection-dominated continuum ⓘ |
| hasGasComponent |
atomic hydrogen
ⓘ
carbon monoxide ⓘ molecular hydrogen ⓘ |
| hasMorphology | bright reflection nebula ⓘ |
| hasObservationBy |
Herschel Space Observatory
ⓘ
Hubble Space Telescope ⓘ Spitzer Space Telescope ⓘ ground-based telescopes ⓘ |
| hasRightAscension | 05h 41m ⓘ |
| hasSpectralTypeOfExcitingStar | B1.5V ⓘ |
| illuminatedBy |
B-type star
ⓘ
HD 37903 ⓘ |
| isBrightIn |
far-infrared
ⓘ
mid-infrared ⓘ near-infrared ⓘ |
| locatedIn |
Milky Way
ⓘ
Orion Molecular Cloud Complex ⓘ |
| locatedInConstellation | Orion ⓘ |
| near |
Alnitak
ⓘ
Horsehead Nebula ⓘ IC 434 ⓘ
linked to:
Barnard 33
|
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ submillimeter wavelengths ⓘ |
| partOf |
Horsehead Nebula region
ⓘ
linked to:
Horsehead Nebula
|
| usedForStudyOf |
interstellar dust
ⓘ
molecular cloud structure ⓘ photodissociation regions ⓘ star formation ⓘ |
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 2023 reflection nebula Description of subject: NGC 2023 is a bright reflection nebula in the constellation Orion, illuminated by a young B-type star and noted for its complex dust structures and role in studies of star formation.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.