M91
E517954
M91 is a barred spiral galaxy located in the constellation Coma Berenices and is one of the fainter members of the Messier catalog.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M91 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T5410448 — 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: M91 Context triple: [Virgo Cluster, containsGalaxy, M91]
-
A.
M-119
M-119 is a scenic state highway in northern Michigan renowned for its winding "Tunnel of Trees" route along the Lake Michigan shoreline.
-
B.
M90
M90 is a major motorway in Scotland that connects Perth to the Forth Road Bridge, forming a key part of the route between the Scottish Highlands and Edinburgh.
-
C.
M-97
M-97 is a state highway in Michigan that serves as a key transportation route through the Detroit metropolitan area, including Warren.
-
D.
M11
M11 is a major motorway in England that connects London to Cambridge and the East Anglia region.
-
E.
M11
M11 is a rich, compact open star cluster in the constellation Scutum, also known as the Wild Duck Cluster.
- 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: M91 Target entity description: M91 is a barred spiral galaxy located in the constellation Coma Berenices and is one of the fainter members of the Messier catalog.
-
A.
M-119
M-119 is a scenic state highway in northern Michigan renowned for its winding "Tunnel of Trees" route along the Lake Michigan shoreline.
-
B.
M90
M90 is a major motorway in Scotland that connects Perth to the Forth Road Bridge, forming a key part of the route between the Scottish Highlands and Edinburgh.
-
C.
M-97
M-97 is a state highway in Michigan that serves as a key transportation route through the Detroit metropolitan area, including Warren.
-
D.
M11
M11 is a major motorway in England that connects London to Cambridge and the East Anglia region.
-
E.
M11
M11 is a rich, compact open star cluster in the constellation Scutum, also known as the Wild Duck Cluster.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf | barred spiral galaxy ⓘ |
| hasAlternateName |
PGC 41934
NERFINISHED
ⓘ
UGC 7753 NERFINISHED ⓘ |
| hasAngularSize | 5.4′ × 4.3′ ⓘ |
| hasApparentMagnitudeV | ~10.2 ⓘ |
| hasBarStructure | yes ⓘ |
| hasConstellation | Coma Berenices NERFINISHED ⓘ |
| hasDeclination | +14°29′47″ ⓘ |
| hasDesignation |
M 91
ⓘ
Messier 91 NERFINISHED ⓘ NGC 4548 NERFINISHED ⓘ |
| hasDiscoveryDate | 1781 ⓘ |
| hasDistance |
~19 Mpc
ⓘ
~63 million light-years ⓘ |
| hasGalaxyClassification | SBb-type barred spiral ⓘ |
| hasGalaxyType | barred spiral galaxy ⓘ |
| hasMorphologicalType |
SB(rs)ab
NERFINISHED
ⓘ
SBb ⓘ |
| hasNotableFeature |
relatively low surface brightness
ⓘ
ring-like inner structure ⓘ strong central bar ⓘ |
| hasRadialVelocity | ~990 km/s ⓘ |
| hasRedshift | 0.0033 ⓘ |
| hasRightAscension | 12h35m26s ⓘ |
| hasSpiralArms | yes ⓘ |
| isBestObservedIn | spring ⓘ |
| isCataloguedIn |
Messier catalogue
NERFINISHED
ⓘ
New General Catalogue NERFINISHED ⓘ |
| isInMessierCatalogue | Messier catalogue NERFINISHED ⓘ |
| isLocatedIn | Virgo Supercluster NERFINISHED ⓘ |
| isLocatedInDirectionOf | Virgo Cluster NERFINISHED ⓘ |
| isLocatedNearOnSky |
M100
NERFINISHED
ⓘ
M88 NERFINISHED ⓘ M90 NERFINISHED ⓘ M98 NERFINISHED ⓘ M99 NERFINISHED ⓘ |
| isMemberOf | Virgo Cluster NERFINISHED ⓘ |
| isObservableFrom | Northern Hemisphere NERFINISHED ⓘ |
| isOneOfFainterMembersOf | Messier catalogue NERFINISHED ⓘ |
| isPartOf | Coma–Virgo region of the sky NERFINISHED ⓘ |
| orbitsCenterOf | Local Supercluster mass distribution ⓘ |
| wasDiscoveredBy | Charles Messier NERFINISHED ⓘ |
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: M91 Description of subject: M91 is a barred spiral galaxy located in the constellation Coma Berenices and is one of the fainter members of the Messier catalog.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.