NGC 2023
E463790
NGC 2023 is a bright reflection nebula in the constellation Orion, illuminated by a young B-type star and noted for its complex dust and gas structures.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 2023 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4617565 — 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 Context triple: [Orion Molecular Cloud Complex, contains, NGC 2023]
-
A.
NGC 2024
NGC 2024, also known as the Flame Nebula, is a bright emission nebula and active star-forming region located in the constellation Orion near the Horsehead Nebula.
-
B.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
C.
NGC 205
NGC 205 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy, notable for its proximity to the Local Group’s largest spiral and its mixed old and young stellar populations.
-
D.
NGC 2246
NGC 2246 is a catalog designation for a bright emission region within the Rosette Nebula, a large star-forming complex in the constellation Monoceros.
-
E.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
- 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 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 and gas structures.
-
A.
NGC 2024
NGC 2024, also known as the Flame Nebula, is a bright emission nebula and active star-forming region located in the constellation Orion near the Horsehead Nebula.
-
B.
NGC 224
NGC 224 is the Andromeda Galaxy, a massive spiral galaxy and the closest major galactic neighbor to the Milky Way.
-
C.
NGC 205
NGC 205 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy, notable for its proximity to the Local Group’s largest spiral and its mixed old and young stellar populations.
-
D.
NGC 2246
NGC 2246 is a catalog designation for a bright emission region within the Rosette Nebula, a large star-forming complex in the constellation Monoceros.
-
E.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
- F. None of above. chosen
Statements (38)
| Predicate | Object |
|---|---|
| instanceOf |
astronomical object
ⓘ
reflection nebula ⓘ |
| catalogCode | NGC 2023 ⓘ |
| contains | photodissociation region ⓘ |
| discoveredBy | William Herschel ⓘ |
| discoveryDate | 1785-01-06 ⓘ |
| distanceFromEarth |
~1300 light-years
ⓘ
~400 parsecs ⓘ |
| hasAngularSize | ~10 arcminutes ⓘ |
| hasDeclination | −02° 16′ ⓘ |
| hasDominantSpectrum | reflected starlight ⓘ |
| hasDust | interstellar dust ⓘ |
| hasEmission | scattered starlight ⓘ |
| hasEnvironment | star-forming molecular cloud ⓘ |
| hasEquinox | J2000 ⓘ |
| hasGas |
ionized gas
ⓘ
molecular gas ⓘ |
| hasIlluminatingStarType | B-type star ⓘ |
| hasObservationTargetType | star-forming region ⓘ |
| hasRightAscension | 05h 41m ⓘ |
| hasScientificInterest |
dust grain properties
ⓘ
interstellar medium structure ⓘ photodissociation region physics ⓘ |
| hasStructure |
complex dust structures
ⓘ
complex gas structures ⓘ |
| isBright | true ⓘ |
| isIlluminatedBy | young B-type star ⓘ |
| isIncludedInCatalog | New General Catalogue ⓘ |
| isNear |
Horsehead Nebula
ⓘ
IC 434 ⓘ
linked to:
IC 434 emission nebula
|
| isObservedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| isPartOf | Orion B cloud ⓘ |
| isTargetOf |
Hubble Space Telescope observations
ⓘ
infrared space telescope observations ⓘ |
| locatedIn | Milky Way ⓘ |
| locatedInConstellation | Orion ⓘ |
| partOf | Orion Molecular Cloud Complex ⓘ |
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 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 and gas structures.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.