Trifid Nebula
E111358
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.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Trifid Nebula canonical | 6 |
| Trifid Nebula region | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T868795 — 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: Trifid Nebula Context triple: [Orion Arm, contains, Trifid 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.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
D.
Orion Nebula
The Orion Nebula is a bright, nearby stellar nursery where new stars and planetary systems are actively forming within the constellation Orion.
-
E.
Lagoon Nebula
The Lagoon Nebula is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, visible even to the naked eye under dark skies.
- 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: Trifid Nebula Target entity description: 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.
-
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.
Eagle Nebula
The Eagle Nebula is a famous star-forming region in the Milky Way best known for the "Pillars of Creation," towering columns of gas and dust captured in iconic Hubble Space Telescope images.
-
D.
Orion Nebula
The Orion Nebula is a bright, nearby stellar nursery where new stars and planetary systems are actively forming within the constellation Orion.
-
E.
Lagoon Nebula
The Lagoon Nebula is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, visible even to the naked eye under dark skies.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
diffuse nebula ⓘ emission nebula ⓘ reflection nebula ⓘ star-forming region ⓘ |
| alsoKnownAs |
M20
ⓘ
Messier 20 ⓘ NGC 6514 ⓘ |
| angularSize | approximately 28 arcminutes ⓘ |
| apparentMagnitudeV | about 6.3 ⓘ |
| bestSeenFrom | southern hemisphere ⓘ |
| bestSeenInMonth | July ⓘ |
| catalog |
Messier catalogue
ⓘ
New General Catalogue ⓘ |
| catalogNumber |
M20
ⓘ
NGC 6514 ⓘ |
| contains |
dark nebulae
ⓘ
embedded protostars ⓘ open star cluster ⓘ star-forming cores ⓘ young massive stars ⓘ |
| declination | −23° 02′ ⓘ |
| discoveredBy | Charles Messier ⓘ |
| discoveryYear | 1764 ⓘ |
| distanceFromEarth |
approximately 1.3 kiloparsecs
ⓘ
approximately 4100 light-years ⓘ |
| emits |
H-alpha radiation
ⓘ
infrared radiation ⓘ optical emission lines ⓘ |
| hasMorphologicalFeature |
bright central region
ⓘ
dark dust lanes ⓘ surrounding reflection nebula ⓘ three-lobed appearance ⓘ |
| hasNotableFeature | combination of emission, reflection, and dark nebula components ⓘ |
| hasRegion |
blue reflection nebula
ⓘ
dark dust lanes dividing nebula ⓘ emission nebula core ⓘ |
| ionizingSource | massive O-type star ⓘ |
| isNearbyObjectOf | Lagoon Nebula ⓘ |
| locatedIn |
Sagittarius Arm
ⓘ
surface form:
Sagittarius Arm of the Milky Way
|
| locatedInConstellation | Sagittarius ⓘ |
| nameEtymology | from Latin "trifidus" meaning "divided into three" ⓘ |
| observedBy |
Chandra X-ray Observatory
ⓘ
Hubble Space Telescope ⓘ Spitzer Space Telescope ⓘ |
| partOf |
Milky Way
ⓘ
surface form:
Milky Way galaxy
|
| rightAscension | 18h 02m ⓘ |
| skyRegion |
Sagittarius Star Cloud
ⓘ
surface form:
Sagittarius star cloud
|
| visibleIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
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: Trifid Nebula Description of subject: 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.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Trifid Nebula region