Jewel Box cluster
E206924
The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Jewel Box Cluster | 4 |
| Kappa Crucis Cluster | 3 |
| Jewel Box cluster canonical | 2 |
| NGC 4755 | 1 |
| named Jewel Box due to its gem-like star colors | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1840799 — 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: Jewel Box cluster Context triple: [Southern Cross, hasNotableDeepSkyObject, Jewel Box cluster]
-
A.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
-
B.
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.
-
C.
Trifid Nebula
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.
-
D.
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.
-
E.
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.
- 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: Jewel Box cluster Target entity description: The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
-
A.
Messier 17
Messier 17, also known as the Omega or Swan Nebula, is a bright star-forming emission nebula located in the constellation Sagittarius.
-
B.
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.
-
C.
Trifid Nebula
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.
-
D.
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.
-
E.
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.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
deep-sky object
ⓘ
open star cluster ⓘ |
| age | approximately 10 million years ⓘ |
| alsoKnownAs |
Caldwell 94
ⓘ
Kappa Crucis Cluster ⓘ
linked to:
Jewel Box cluster
NGC 4755 ⓘ |
| angularSize | 10 arcminutes ⓘ |
| apparentMagnitudeV | 4.2 ⓘ |
| appearsNear |
Southern Cross asterism
ⓘ
linked to:
Crux constellation
|
| approximateStarCount | about 100 stars ⓘ |
| bestSeenFromHemisphere | Southern Hemisphere ⓘ |
| catalogDesignation |
Caldwell 94
ⓘ
Kappa Crucis Cluster ⓘ
linked to:
Jewel Box cluster
NGC 4755 ⓘ |
| classification | Trumpler II 3 m ⓘ |
| contains |
blue supergiant stars
ⓘ
red supergiant stars ⓘ |
| containsBrightStar | Kappa Crucis ⓘ |
| containsNotableStar | red supergiant V399 Carinae (within field, often associated observationally) ⓘ |
| declination | −60° 22′ ⓘ |
| discoveredBy |
Nicolas-Louis de Lacaille
ⓘ
linked to:
Nicolas de Lacaille
|
| discoveryYear | 1751 ⓘ |
| distanceFromEarth |
approximately 1,950 parsecs
ⓘ
approximately 6,400 light-years ⓘ |
| dominantColor | blue ⓘ |
| galacticLatitude | −0.1° (approximate) ⓘ |
| galacticLocation | Milky Way ⓘ |
| galacticLongitude | 303.2° (approximate) ⓘ |
| hasColorContrastDescribedAs | a casket of variously colored precious stones ⓘ |
| hasColorIndexRange | from very blue to very red ⓘ |
| HerschelDescription | a casket of variously colored precious stones ⓘ |
| isTargetFor |
amateur astronomers
ⓘ
astrophotographers ⓘ |
| locatedIn | southern Milky Way star fields ⓘ |
| locatedInConstellation | Crux ⓘ |
| notableFor | striking color contrast of blue and red stars ⓘ |
| notableObserver | John Herschel ⓘ |
| observationalSeason | autumn and winter in Southern Hemisphere ⓘ |
| observedIn | visible light ⓘ |
| partOf | Crux region of the Milky Way ⓘ |
| rightAscension | 12h 53m ⓘ |
| spectralTypesPresent |
B-type stars
ⓘ
K-type stars ⓘ M-type stars ⓘ O-type stars ⓘ |
| stellarPopulation | young massive stars ⓘ |
| visibleWith | small telescope ⓘ |
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: Jewel Box cluster Description of subject: The Jewel Box cluster is a bright and colorful open star cluster in the constellation Crux, renowned for its striking mix of blue and red stars visible even in small telescopes.
Referenced by (11)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Jewel Box cluster
linked to: Jewel Box cluster
linked to: Jewel Box cluster
linked to: Jewel Box cluster
subject linked to:
Crux constellation
linked to: Jewel Box cluster
linked to: Jewel Box cluster
linked to: Jewel Box cluster
linked to: Jewel Box cluster
linked to: Jewel Box cluster