NGC 6231
E505739
NGC 6231 is a bright, young open star cluster located near the tail of the constellation Scorpius, notable for its massive, hot stars and role as the core of the Scorpius OB1 association.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 6231 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4835398 — 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 6231 Context triple: [Scorpius, containsDeepSkyObject, NGC 6231]
-
A.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
B.
NGC 6611
NGC 6611 is a young, massive open star cluster embedded within the Eagle Nebula, notable for illuminating and shaping its surrounding interstellar gas and dust.
-
C.
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.
-
D.
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.
-
E.
NGC 6618
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.
- 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 6231 Target entity description: NGC 6231 is a bright, young open star cluster located near the tail of the constellation Scorpius, notable for its massive, hot stars and role as the core of the Scorpius OB1 association.
-
A.
NGC 346
NGC 346 is a prominent star-forming region and open cluster in the Small Magellanic Cloud, known for its young, massive stars and complex nebular structures.
-
B.
NGC 6611
NGC 6611 is a young, massive open star cluster embedded within the Eagle Nebula, notable for illuminating and shaping its surrounding interstellar gas and dust.
-
C.
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.
-
D.
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.
-
E.
NGC 6618
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| age | ~3–7 million years ⓘ |
| angularSize | ~15 arcminutes ⓘ |
| apparentMagnitudeV | ~2.6 ⓘ |
| associatedWith |
Sco OB1 association
ⓘ
linked to:
Scorpius OB1 association
|
| bestSeenFrom | Southern Hemisphere ⓘ |
| bestViewingMonth | July ⓘ |
| catalogCode |
Caldwell 76
ⓘ
Cr 315 ⓘ Melotte 153 ⓘ NGC 6231 ⓘ |
| contains |
B-type stars
ⓘ
O-type stars ⓘ massive binary stars ⓘ pre-main-sequence stars ⓘ |
| declination | −41° 48′ ⓘ |
| discoveredBy | Giovanni Battista Hodierna ⓘ |
| discoveryYear | 1654 ⓘ |
| distanceFromEarth |
~1.6 kiloparsecs
ⓘ
~5200 light-years ⓘ |
| galacticLatitude | ~+1.0° ⓘ |
| galacticLongitude | ~343.5° ⓘ |
| hasAlternativeName |
C76
ⓘ
Cr 315 ⓘ Mel 153 ⓘ The Northern Jewel Box ⓘ |
| hasProperty |
rich in massive stars
ⓘ
significant X-ray emission from young stars ⓘ strong stellar winds ⓘ |
| hasResearchInterest |
cluster dynamics of massive stars
ⓘ
massive star formation ⓘ stellar evolution in young clusters ⓘ |
| hasStarType |
hot stars
ⓘ
massive stars ⓘ |
| is |
bright open cluster
ⓘ
young stellar cluster ⓘ |
| locatedIn |
Milky Way
ⓘ
Sagittarius Arm ⓘ |
| locatedInConstellation | Scorpius ⓘ |
| locatedNear | tail of the constellation Scorpius ⓘ |
| memberOf | Scorpius OB1 association ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
optical wavelengths ⓘ |
| partOf |
Sco OB1 complex
ⓘ
linked to:
Scorpius OB1 association
|
| rightAscension | 16h 54m ⓘ |
| role | core of the Scorpius OB1 association ⓘ |
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 6231 Description of subject: NGC 6231 is a bright, young open star cluster located near the tail of the constellation Scorpius, notable for its massive, hot stars and role as the core of the Scorpius OB1 association.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.