NGC 6618
E485916
NGC 6618 is a young, massive open star cluster embedded in the Omega Nebula (M17), notable for its intense star formation and luminous, hot stars.
All labels observed (4)
| Label | Occurrences |
|---|---|
| NGC 6618 canonical | 6 |
| NGC 6618 star cluster | 1 |
| open cluster NGC 6618 | 1 |
| open star cluster NGC 6618 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4736295 — 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 6618 Context triple: [Open cluster M17, catalogDesignation, NGC 6618]
-
A.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
-
B.
NGC 6705
NGC 6705 is a rich, compact open star cluster in the constellation Scutum, notable for its high stellar density and brightness, making it one of the most impressive open clusters in the Milky Way.
-
C.
NGC 6604
NGC 6604 is a young, compact open star cluster associated with the Serpens OB2 association, located near the Eagle Nebula in the constellation Serpens.
-
D.
NGC 6514
NGC 6514 is a bright, colorful emission and reflection nebula in the constellation Sagittarius, widely known as the Trifid Nebula.
-
E.
NGC 2068
NGC 2068, also known as the reflection nebula M78, is a bright star-forming cloud of gas and dust located in the constellation Orion.
- 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 6618 Target entity description: NGC 6618 is a young, massive open star cluster embedded in the Omega Nebula (M17), notable for its intense star formation and luminous, hot stars.
-
A.
NGC 6205
NGC 6205 is a bright, densely packed globular star cluster in the constellation Hercules, commonly known as the Great Hercules Cluster (M13).
-
B.
NGC 6705
NGC 6705 is a rich, compact open star cluster in the constellation Scutum, notable for its high stellar density and brightness, making it one of the most impressive open clusters in the Milky Way.
-
C.
NGC 6604
NGC 6604 is a young, compact open star cluster associated with the Serpens OB2 association, located near the Eagle Nebula in the constellation Serpens.
-
D.
NGC 6514
NGC 6514 is a bright, colorful emission and reflection nebula in the constellation Sagittarius, widely known as the Trifid Nebula.
-
E.
NGC 2068
NGC 2068, also known as the reflection nebula M78, is a bright star-forming cloud of gas and dust located in the constellation Orion.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
embedded star cluster
ⓘ
open star cluster ⓘ stellar association ⓘ young star cluster ⓘ |
| age |
approximately 1 million years
ⓘ
younger than 3 million years ⓘ |
| associatedWith |
X-ray emission from young stars
ⓘ
infrared emission ⓘ massive star formation ⓘ |
| catalog | New General Catalogue ⓘ |
| contains |
B-type stars
ⓘ
OB association ⓘ massive O-type stars ⓘ pre-main-sequence stars ⓘ protostars ⓘ young stellar objects ⓘ |
| discoveredBy | John Herschel ⓘ |
| distanceFromEarth |
approximately 1.6 kiloparsecs
ⓘ
approximately 5000 light-years ⓘ |
| embeddedIn |
H II region M17
ⓘ
linked to:
Messier 17
giant molecular cloud ⓘ |
| excites | H II region emission in M17 ⓘ |
| hasAlternativeName |
M17 cluster
ⓘ
NGC 6618 star cluster ⓘ
linked to:
NGC 6618
Omega Nebula cluster ⓘ
linked to:
Omega Nebula
|
| hasMass | several thousand solar masses ⓘ |
| hasProperty |
high stellar density
ⓘ
high total luminosity ⓘ intense ultraviolet radiation field ⓘ ongoing star formation ⓘ strong stellar winds ⓘ |
| hasRole | main ionizing source of the Omega Nebula ⓘ |
| hasStellarPopulation |
hundreds of massive stars
ⓘ
thousands of low-mass stars ⓘ |
| ionizes | gas in the Omega Nebula ⓘ |
| isStudiedFor |
cluster formation and early evolution
ⓘ
feedback of massive stars on molecular clouds ⓘ massive star formation processes ⓘ |
| locatedIn |
Galactic plane
ⓘ
Messier 17 ⓘ Milky Way ⓘ Omega Nebula ⓘ Sagittarius Arm ⓘ Sagittarius constellation ⓘ
linked to:
Sagittarius
|
| observedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ |
| partOf |
M17 star-forming region
ⓘ
linked to:
M17 star-forming 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 6618 Description of subject: NGC 6618 is a young, massive open star cluster embedded in the Omega Nebula (M17), notable for its intense star formation and luminous, hot stars.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: NGC 6618
linked to: NGC 6618