M49
E517948
M49 is a giant elliptical galaxy in the constellation Virgo and one of the brightest and most massive members of the Virgo Cluster.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M49 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5410441 — 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: M49 Context triple: [Virgo Cluster, containsGalaxy, M49]
-
A.
M66
M66 is a motorway in Greater Manchester, England, forming part of the route between Manchester and the M62 near Bury.
-
B.
Messier 110
Messier 110 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy located in the Local Group.
-
C.
Messier 80
Messier 80 is a dense globular star cluster located in the constellation Scorpius, notable for its rich population of stars and high central concentration.
-
D.
Messier 51
Messier 51, also known as the Whirlpool Galaxy, is a famous face-on spiral galaxy in the constellation Canes Venatici noted for its striking structure and interaction with a companion galaxy.
-
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: M49 Target entity description: M49 is a giant elliptical galaxy in the constellation Virgo and one of the brightest and most massive members of the Virgo Cluster.
-
A.
M66
M66 is a motorway in Greater Manchester, England, forming part of the route between Manchester and the M62 near Bury.
-
B.
Messier 110
Messier 110 is a dwarf elliptical satellite galaxy of the Andromeda Galaxy located in the Local Group.
-
C.
Messier 80
Messier 80 is a dense globular star cluster located in the constellation Scorpius, notable for its rich population of stars and high central concentration.
-
D.
Messier 51
Messier 51, also known as the Whirlpool Galaxy, is a famous face-on spiral galaxy in the constellation Canes Venatici noted for its striking structure and interaction with a companion galaxy.
-
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 (44)
| Predicate | Object |
|---|---|
| instanceOf |
galaxy
ⓘ
giant elliptical galaxy ⓘ |
| absoluteMagnitudeV | -22.8 ⓘ |
| angularSize | 9.8′ × 7.4′ ⓘ |
| apparentMagnitudeV | 9.4 ⓘ |
| bestSeenInMonth | May ⓘ |
| catalogCode |
M49
ⓘ
Messier 49 NERFINISHED ⓘ NGC 4472 NERFINISHED ⓘ PGC 41220 NERFINISHED ⓘ |
| constellation | Virgo NERFINISHED ⓘ |
| declination | +08° 00′ 02″ ⓘ |
| discoverer | Charles Messier NERFINISHED ⓘ |
| discoveryDate | 1771-02-19 ⓘ |
| distanceFromEarth |
~17.1 Mpc
ⓘ
~56 million light-years ⓘ |
| dominatesRegionOf | southern Virgo Cluster ⓘ |
| environment | cluster central galaxy ⓘ |
| epoch | J2000 ⓘ |
| hasGlobularClusterSystem | yes ⓘ |
| hasRadioEmission | yes ⓘ |
| hasSupermassiveBlackHole | yes ⓘ |
| hasXRayEmission | yes ⓘ |
| includedInCatalog |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ Principal Galaxies Catalogue NERFINISHED ⓘ |
| isAmongBrightestMembersOf | Virgo Cluster NERFINISHED ⓘ |
| isBrightestGalaxyIn | southern Virgo Cluster NERFINISHED ⓘ |
| locatedInHemisphere | northern celestial hemisphere ⓘ |
| locatedInSupercluster | Virgo Supercluster NERFINISHED ⓘ |
| luminosity | ~7×10^10 solar luminosities ⓘ |
| mass | ~10^12 solar masses ⓘ |
| memberOf | Virgo Cluster NERFINISHED ⓘ |
| morphologicalType | E2 ⓘ |
| numberOfGlobularClusters | ~6000 ⓘ |
| observedInWavelength |
X-ray
ⓘ
optical ⓘ radio ⓘ |
| radialVelocity | ~997 km/s ⓘ |
| redshift | 0.0033 ⓘ |
| rightAscension | 12h 29m 46.8s ⓘ |
| supermassiveBlackHoleMass | ~5×10^8 solar masses ⓘ |
| surfaceBrightnessProfile | de Vaucouleurs law NERFINISHED ⓘ |
| xRayEmissionOrigin | hot intracluster gas ⓘ |
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: M49 Description of subject: M49 is a giant elliptical galaxy in the constellation Virgo and one of the brightest and most massive members of the Virgo Cluster.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.