Omega Centauri
E481658
Omega Centauri is the largest and brightest known globular star cluster in the Milky Way, visible to the naked eye and containing millions of ancient stars.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Omega Centauri canonical | 2 |
| NGC 5139 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4943583 — 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: Omega Centauri Context triple: [Centaurus constellation region, contains, Omega Centauri]
-
A.
Hercules Globular Cluster
The Hercules Globular Cluster is a bright, densely packed spherical star cluster in the constellation Hercules, notable as one of the most prominent and studied globular clusters in the northern sky.
-
B.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
C.
Messier 67
Messier 67 is a rich, old open star cluster located in the constellation Cancer and is one of the most studied stellar clusters in the Milky Way.
-
D.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- 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: Omega Centauri Target entity description: Omega Centauri is the largest and brightest known globular star cluster in the Milky Way, visible to the naked eye and containing millions of ancient stars.
-
A.
Hercules Globular Cluster
The Hercules Globular Cluster is a bright, densely packed spherical star cluster in the constellation Hercules, notable as one of the most prominent and studied globular clusters in the northern sky.
-
B.
Messier 55
Messier 55 is a large, relatively loose globular star cluster located in the constellation Sagittarius, visible in small telescopes as a faint, diffuse ball of stars.
-
C.
Messier 67
Messier 67 is a rich, old open star cluster located in the constellation Cancer and is one of the most studied stellar clusters in the Milky Way.
-
D.
Messier 54
Messier 54 is a dense globular star cluster located in the constellation Sagittarius, notable for being one of the first globular clusters found to belong to a dwarf galaxy outside the Milky Way.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
deep-sky object
ⓘ
globular cluster ⓘ stellar system ⓘ |
| age_gyr | about 12 billion years ⓘ |
| alsoKnownAs |
Caldwell 80
NERFINISHED
ⓘ
NGC 5139 NERFINISHED ⓘ ω Centauri NERFINISHED ⓘ |
| angularDiameter_arcmin | about 36 arcminutes ⓘ |
| apparentMagnitudeV | 3.7 ⓘ |
| belongsTo | Galactic halo ⓘ |
| CaldwellNumber | 80 ⓘ |
| catalog |
Caldwell catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| celestialHemisphere | southern celestial hemisphere ⓘ |
| classifiedAsGlobularClusterBy | John Herschel NERFINISHED ⓘ |
| contains |
ancient stars
ⓘ
millions of stars ⓘ |
| declination_J2000 | −47° 28′ 46″ ⓘ |
| discoveredBy | Ptolemy NERFINISHED ⓘ |
| discoveryEpoch | antiquity ⓘ |
| distanceFromEarth_kpc | about 4.9 kiloparsecs ⓘ |
| distanceFromEarth_ly | about 15800 light-years ⓘ |
| galacticLatitude_deg | 14.97 ⓘ |
| galacticLongitude_deg | 309.10 ⓘ |
| hasHypothesis |
may be remnant core of a dwarf galaxy
ⓘ
may host an intermediate-mass black hole ⓘ |
| hasProperty |
brightest globular cluster in the Milky Way
ⓘ
flattened shape ⓘ high central stellar density ⓘ high velocity dispersion ⓘ largest known globular cluster in the Milky Way ⓘ multiple stellar populations ⓘ spread in metallicity among its stars ⓘ |
| isTargetOf |
Gaia mission observations
ⓘ
Hubble Space Telescope observations ⓘ |
| isVisibleTo | naked eye ⓘ |
| linearDiameter_ly | about 150 light-years ⓘ |
| locatedIn |
Milky Way
ⓘ
constellation Centaurus ⓘ |
| mass_solarMasses | about 4 million solar masses ⓘ |
| metallicity_FeH | about −1.6 ⓘ |
| NGCNumber | 5139 ⓘ |
| observedIn |
X-ray wavelengths
ⓘ
infrared wavelengths ⓘ optical wavelengths ⓘ |
| orbits | Milky Way center NERFINISHED ⓘ |
| rightAscension_J2000 | 13h 26m 47.3s ⓘ |
| spectralTypeDominant | K-type giants ⓘ |
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: Omega Centauri Description of subject: Omega Centauri is the largest and brightest known globular star cluster in the Milky Way, visible to the naked eye and containing millions of ancient stars.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
NGC 5139