M17
E465450
M17 is a bright, massive star-forming region and open star cluster embedded in the Omega (Swan) Nebula in the constellation Sagittarius.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M17 canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T4736293 — 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: M17 Context triple: [Open cluster M17, catalogDesignation, M17]
-
A.
M-153
M-153 is a state trunkline highway in Michigan, commonly known as Ford Road, that serves as a major east–west arterial route through the Detroit metropolitan area.
-
B.
M-77
M-77 is a state highway in Michigan, United States, running north–south through the eastern Upper Peninsula.
-
C.
M-37
M-37 is a state highway in Michigan that runs up the Old Mission Peninsula, providing scenic access between Traverse City and the peninsula’s vineyards, orchards, and shoreline.
-
D.
M-14
M-14 is a state highway in southeastern Michigan that serves as a major commuter route connecting Ann Arbor with the western suburbs of the Detroit metropolitan area.
-
E.
M-45
M-45 is a major ring road in the Madrid metropolitan area that helps divert traffic around the city and connect several eastern suburbs.
- 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: M17 Target entity description: M17 is a bright, massive star-forming region and open star cluster embedded in the Omega (Swan) Nebula in the constellation Sagittarius.
-
A.
M-153
M-153 is a state trunkline highway in Michigan, commonly known as Ford Road, that serves as a major east–west arterial route through the Detroit metropolitan area.
-
B.
M-77
M-77 is a state highway in Michigan, United States, running north–south through the eastern Upper Peninsula.
-
C.
M-37
M-37 is a state highway in Michigan that runs up the Old Mission Peninsula, providing scenic access between Traverse City and the peninsula’s vineyards, orchards, and shoreline.
-
D.
M-14
M-14 is a state highway in southeastern Michigan that serves as a major commuter route connecting Ann Arbor with the western suburbs of the Detroit metropolitan area.
-
E.
M-45
M-45 is a major ring road in the Madrid metropolitan area that helps divert traffic around the city and connect several eastern suburbs.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
H II region
ⓘ
Messier object ⓘ NGC object ⓘ emission nebula ⓘ open star cluster ⓘ star-forming region ⓘ |
| addedToMessierCatalogueBy | Charles Messier ⓘ |
| angularSize | 11 arcminutes × 6 arcminutes ⓘ |
| apparentMagnitudeV | 6.0 ⓘ |
| contains |
dust lanes
ⓘ
massive young stars ⓘ molecular clouds ⓘ open star cluster NGC 6618 ⓘ
linked to:
NGC 6618
|
| declination | −16° 11′ ⓘ |
| discoveredBy | Philippe Loys de Chéseaux ⓘ |
| discoveryYear | 1745 ⓘ |
| distanceFromEarth |
about 1.6 kiloparsecs
ⓘ
about 5000 light-years ⓘ |
| dominantEmission | H-alpha ⓘ |
| galacticLatitude | about −0.7 degrees ⓘ |
| galacticLongitude | about 15.1 degrees ⓘ |
| hasAlternativeName |
Checkmark Nebula
ⓘ
Horseshoe Nebula ⓘ Omega Nebula ⓘ Swan Nebula ⓘ |
| hasCatalogueNumber |
M17
ⓘ
Messier 17 ⓘ NGC 6618 ⓘ |
| hasColor | reddish ⓘ |
| hasFeature | bright ionization front ⓘ |
| hasPhysicalProcess |
ionization of hydrogen gas
ⓘ
massive star formation ⓘ |
| hasShape |
omega-shaped
ⓘ
swan-like ⓘ |
| isPartOf |
Sagittarius Star Cloud region
ⓘ
linked to:
Sagittarius Star Cloud
|
| isPopularTargetFor |
amateur astronomers
ⓘ
astrophotography ⓘ |
| locatedIn |
Milky Way
ⓘ
Sagittarius Arm of the Milky Way ⓘ
linked to:
Sagittarius Arm
|
| locatedInConstellation | Sagittarius ⓘ |
| messierCatalogueEntryYear | 1764 ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ radio ⓘ |
| rightAscension | 18h 20m ⓘ |
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: M17 Description of subject: M17 is a bright, massive star-forming region and open star cluster embedded in the Omega (Swan) Nebula in the constellation Sagittarius.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.