NGC 4755
E753979
NGC 4755 is a bright, young open star cluster in the constellation Crux, noted for its colorful stars and striking appearance in small telescopes.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 4755 canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T8717177 — 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 4755 Context triple: [Jewel Box cluster, alsoKnownAs, NGC 4755]
-
A.
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.
-
B.
NGC 6523
NGC 6523 is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, commonly known as the Lagoon Nebula.
-
C.
NGC 6923
NGC 6923 is a spiral galaxy located in the constellation Microscopium.
-
D.
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.
-
E.
NGC 3132
NGC 3132 is a bright, elliptical planetary nebula in the constellation Vela, noted for its striking ring-like appearance and complex internal structure.
- 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 4755 Target entity description: NGC 4755 is a bright, young open star cluster in the constellation Crux, noted for its colorful stars and striking appearance in small telescopes.
-
A.
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.
-
B.
NGC 6523
NGC 6523 is a large, bright emission nebula and active star-forming region located in the constellation Sagittarius, commonly known as the Lagoon Nebula.
-
C.
NGC 6923
NGC 6923 is a spiral galaxy located in the constellation Microscopium.
-
D.
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.
-
E.
NGC 3132
NGC 3132 is a bright, elliptical planetary nebula in the constellation Vela, noted for its striking ring-like appearance and complex internal structure.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| age |
approximately 10 million years
ⓘ
young star cluster ⓘ |
| alsoKnownAs |
Caldwell 94
ⓘ
Jewel Box Cluster ⓘ
linked to:
Jewel Box cluster
Kappa Crucis Cluster ⓘ
linked to:
Jewel Box cluster
|
| angularSize | 10 arcminutes ⓘ |
| apparentMagnitudeV | 4.2 ⓘ |
| bestSeenIn | autumn in Southern Hemisphere ⓘ |
| catalog | New General Catalogue ⓘ |
| clusterType | Trumpler type II 3 m ⓘ |
| contains |
evolved giant stars
ⓘ
main-sequence stars ⓘ |
| containsStar |
Kappa Crucis
ⓘ
bright blue supergiant stars ⓘ bright red supergiant star ⓘ |
| declination | −60° 22′ ⓘ |
| declinationHemisphere | far southern sky ⓘ |
| discoveredBy |
Nicolas-Louis de Lacaille
ⓘ
linked to:
Nicolas de Lacaille
|
| discoveryYear | 1751 ⓘ |
| distanceFromEarth |
approximately 2,000 parsecs
ⓘ
approximately 6,400 light-years ⓘ |
| estimatedMass | approximately 6,300 solar masses ⓘ |
| evolutionaryStatus | still associated with young stellar population ⓘ |
| galacticLatitude | −0.4° ⓘ |
| galacticLongitude | 303.2° ⓘ |
| hasApproximateStarCount | about 100 stars ⓘ |
| hasColorContrast | blue and red stars ⓘ |
| hasPhotogenicAppearance | popular astrophotography target ⓘ |
| hemisphereVisibility | Southern Hemisphere ⓘ |
| includedIn |
ESO photographic surveys
ⓘ
linked to:
ESO/Uppsala Survey of the ESO(B) Atlas
|
| locatedIn |
Carina–Sagittarius Arm
ⓘ
linked to:
Sagittarius Arm
Milky Way ⓘ |
| locatedInConstellation | Crux ⓘ |
| metallicity | near-solar ⓘ |
| notableFor |
colorful stars
ⓘ
striking appearance in small telescopes ⓘ |
| observedIn |
infrared wavelengths
ⓘ
optical wavelengths ⓘ |
| partOf | Caldwell catalogue ⓘ |
| rightAscension | 12h 53m ⓘ |
| spectralTypeDominant | B-type stars ⓘ |
| stellarPopulation | Population I ⓘ |
| visibility | naked-eye object under dark skies ⓘ |
| visibleWith |
binoculars
ⓘ
small telescopes ⓘ |
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 4755 Description of subject: NGC 4755 is a bright, young open star cluster in the constellation Crux, noted for its colorful stars and striking appearance in small telescopes.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.