NGC 4649
E525422
NGC 4649, also known as Messier 60, is a massive elliptical galaxy in the constellation Virgo notable for its bright central region and supermassive black hole.
All labels observed (1)
| Label | Occurrences |
|---|---|
| NGC 4649 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5410462 — 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 4649 Context triple: [Virgo Cluster, containsGalaxy, NGC 4649]
-
A.
NGC 4438
NGC 4438 is a heavily distorted spiral galaxy in the constellation Virgo, notable for its tidal interactions and membership in the Virgo Cluster.
-
B.
NGC 4639
NGC 4639 is a barred spiral galaxy in the constellation Virgo that hosts an active galactic nucleus and lies on the outskirts of the Virgo Cluster.
-
C.
NGC 4622
NGC 4622 is an unusual spiral galaxy notable for its rare leading spiral arms and distinctive ring-like structure, located in the constellation Centaurus.
-
D.
NGC 5128
NGC 5128, also known as Centaurus A, is a nearby peculiar elliptical galaxy with a prominent dust lane and one of the strongest radio sources in the sky.
-
E.
NGC 5236
NGC 5236, also known as the Southern Pinwheel Galaxy or Messier 83, is a bright, nearby barred spiral starburst galaxy prominent in the constellation Hydra.
- 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 4649 Target entity description: NGC 4649, also known as Messier 60, is a massive elliptical galaxy in the constellation Virgo notable for its bright central region and supermassive black hole.
-
A.
NGC 4438
NGC 4438 is a heavily distorted spiral galaxy in the constellation Virgo, notable for its tidal interactions and membership in the Virgo Cluster.
-
B.
NGC 4639
NGC 4639 is a barred spiral galaxy in the constellation Virgo that hosts an active galactic nucleus and lies on the outskirts of the Virgo Cluster.
-
C.
NGC 4622
NGC 4622 is an unusual spiral galaxy notable for its rare leading spiral arms and distinctive ring-like structure, located in the constellation Centaurus.
-
D.
NGC 5128
NGC 5128, also known as Centaurus A, is a nearby peculiar elliptical galaxy with a prominent dust lane and one of the strongest radio sources in the sky.
-
E.
NGC 5236
NGC 5236, also known as the Southern Pinwheel Galaxy or Messier 83, is a bright, nearby barred spiral starburst galaxy prominent in the constellation Hydra.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
Virgo Cluster member ⓘ elliptical galaxy ⓘ |
| alsoKnownAs |
M60
NERFINISHED
ⓘ
Messier 60 NERFINISHED ⓘ PGC 42831 NERFINISHED ⓘ UGC 7898 NERFINISHED ⓘ |
| angularSize | 7.4 × 6.0 arcminutes ⓘ |
| apparentMagnitudeV | 8.8 ⓘ |
| centralRegion | bright ⓘ |
| colorIndex | red ⓘ |
| constellation | Virgo NERFINISHED ⓘ |
| darkMatterContent | significant ⓘ |
| declination | +11° 33′ 10″ ⓘ |
| discoverer | Johann Gottfried Koehler NERFINISHED ⓘ |
| discoveryDate | 1779 ⓘ |
| distanceFromEarth |
about 16.5 megaparsecs
ⓘ
about 54 million light-years ⓘ |
| dominantStellarPopulation | old stars ⓘ |
| environment | cluster elliptical ⓘ |
| galaxyCluster | Virgo Cluster NERFINISHED ⓘ |
| gasContent | poor in cold gas ⓘ |
| groupMembership | M60 group NERFINISHED ⓘ |
| hasCompanionGalaxy | NGC 4647 NERFINISHED ⓘ |
| hasGlobularClusterSystem | rich ⓘ |
| hasNuclearActivity | low-level ⓘ |
| hasSupermassiveBlackHoleMass | about 4.5 billion solar masses ⓘ |
| hasXRayEmission | yes ⓘ |
| hostGalaxyOf | supermassive black hole ⓘ |
| HubbleType | E2 ⓘ |
| includedInCatalogue |
Messier Catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| interactionTypeWithNGC 4647 | weak gravitational interaction ⓘ |
| locatedInSupercluster | Virgo Supercluster NERFINISHED ⓘ |
| mass | on the order of 10^12 solar masses ⓘ |
| morphologicalType | E2 ⓘ |
| numberOfGlobularClusters | several thousand ⓘ |
| observedInWavelength |
X-ray
ⓘ
optical ⓘ radio ⓘ |
| orientation | nearly round on the sky ⓘ |
| positionInSky | near the eastern part of Virgo ⓘ |
| radialVelocity | 1117 km/s ⓘ |
| redshift | 0.003726 ⓘ |
| rightAscension | 12h 43m 40s ⓘ |
| starFormationRate | very low ⓘ |
| surfaceBrightness | high central surface brightness ⓘ |
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 4649 Description of subject: NGC 4649, also known as Messier 60, is a massive elliptical galaxy in the constellation Virgo notable for its bright central region and supermassive black hole.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.