Messier 99
E1487096
UNEXPLORED
Messier 99 is a bright, nearly face-on grand design spiral galaxy located in the Virgo Cluster, notable for its asymmetric structure and active star formation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier 99 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T21026616 — 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: Messier 99 Context triple: [M99, alsoKnownAs, Messier 99]
-
A.
Messier 98
Messier 98 is a large, nearly edge-on spiral galaxy in the constellation Coma Berenices, located in the Virgo Cluster and known for its high radial velocity and rich dust lanes.
-
B.
Messier 89
Messier 89 is an elliptical galaxy in the Virgo Cluster notable for its nearly spherical appearance and extensive system of surrounding gas and dust shells.
-
C.
Messier 109
Messier 109 is a barred spiral galaxy located in the constellation Ursa Major and is one of the brighter members of the Messier catalog.
-
D.
Messier 74
Messier 74 is a face-on spiral galaxy in the constellation Pisces, noted for its well-defined structure and frequent use as a reference object in studies of galactic morphology.
-
E.
Messier 102
Messier 102 is a disputed entry in Charles Messier’s catalog, commonly identified with the edge-on spiral galaxy NGC 5866 in the constellation Draco.
- 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: Messier 99 Target entity description: Messier 99 is a bright, nearly face-on grand design spiral galaxy located in the Virgo Cluster, notable for its asymmetric structure and active star formation.
-
A.
Messier 98
Messier 98 is a large, nearly edge-on spiral galaxy in the constellation Coma Berenices, located in the Virgo Cluster and known for its high radial velocity and rich dust lanes.
-
B.
Messier 89
Messier 89 is an elliptical galaxy in the Virgo Cluster notable for its nearly spherical appearance and extensive system of surrounding gas and dust shells.
-
C.
Messier 109
Messier 109 is a barred spiral galaxy located in the constellation Ursa Major and is one of the brighter members of the Messier catalog.
-
D.
Messier 74
Messier 74 is a face-on spiral galaxy in the constellation Pisces, noted for its well-defined structure and frequent use as a reference object in studies of galactic morphology.
-
E.
Messier 102
Messier 102 is a disputed entry in Charles Messier’s catalog, commonly identified with the edge-on spiral galaxy NGC 5866 in the constellation Draco.
- F. None of above. chosen
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.