M25
E459052
M25 is a bright open star cluster in the constellation Sagittarius, visible with binoculars and often studied as a young stellar grouping in the Milky Way.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M25 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4617768 — 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.
Target entity: M25 Context triple: [Open cluster M25, alsoKnownAs, M25]
-
A.
M25
M25 is a major orbital motorway encircling most of Greater London in the United Kingdom.
-
B.
M5
M5 is a major British motorway that runs through the West Midlands and South West England, connecting the Midlands to the South West peninsula.
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C.
M55
M55 is a New York City bus route that provides public transit service connecting to the Whitehall Terminal area in Lower Manhattan.
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D.
M2
M2 is the second line of the Warsaw Metro, running east–west across the city and connecting key districts on both sides of the Vistula River.
-
E.
M2
M2 is one of the main lines of the Copenhagen Metro, connecting central Copenhagen with key districts and the airport.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: M25 Target entity description: M25 is a bright open star cluster in the constellation Sagittarius, visible with binoculars and often studied as a young stellar grouping in the Milky Way.
-
A.
M25
M25 is a major orbital motorway encircling most of Greater London in the United Kingdom.
-
B.
M5
M5 is a major British motorway that runs through the West Midlands and South West England, connecting the Midlands to the South West peninsula.
-
C.
M55
M55 is a New York City bus route that provides public transit service connecting to the Whitehall Terminal area in Lower Manhattan.
-
D.
M2
M2 is a major British motorway that connects London with the port town of Dover in Kent, serving as an important route to the Channel ports.
-
E.
M2
M2 is the second line of the Warsaw Metro, running east–west across the city and connecting key districts on both sides of the Vistula River.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
Messier object
ⓘ
deep-sky object ⓘ open star cluster ⓘ |
| addedToMessierCatalogueBy | Charles Messier NERFINISHED ⓘ |
| age |
(8–100) million years range
ⓘ
~90 million years ⓘ |
| angularSize | 32 arcminutes ⓘ |
| apparentMagnitudeV | 4.6 ⓘ |
| appearsIn |
Index Catalogue
NERFINISHED
ⓘ
Messier Catalogue NERFINISHED ⓘ New General Catalogue NERFINISHED ⓘ |
| approximateNumberOfMemberStars | >100 ⓘ |
| bestSeenFrom |
Northern Hemisphere
NERFINISHED
ⓘ
Southern Hemisphere NERFINISHED ⓘ |
| bestSeenIn | summer ⓘ |
| catalogCode |
IC 4725
NERFINISHED
ⓘ
Messier 25 NERFINISHED ⓘ NGC 4725 NERFINISHED ⓘ |
| constellation | Sagittarius NERFINISHED ⓘ |
| containsCepheidVariable | U Sagittarii NERFINISHED ⓘ |
| containsVariableStar | U Sagittarii NERFINISHED ⓘ |
| declination | −19° 15′ ⓘ |
| discoveredBy | Philippe Loys de Chéseaux NERFINISHED ⓘ |
| discoveryYear | 1745 ⓘ |
| distanceFromEarth |
~2000 light-years
ⓘ
~600 parsecs ⓘ |
| galacticLatitude | −5.7° ⓘ |
| galacticLongitude | 13.9° ⓘ |
| hasIntegratedSpectralType | approximately F ⓘ |
| hasTrumplerClassification | II,3,m ⓘ |
| isPartOf | Sagittarius star cloud region NERFINISHED ⓘ |
| isSubjectOf |
Cepheid calibration studies
ⓘ
open cluster evolution studies ⓘ |
| locatedIn |
Milky Way
ⓘ
Sagittarius Arm NERFINISHED ⓘ |
| locatedNear | Galactic plane NERFINISHED ⓘ |
| messierCatalogueEntryYear | 1764 ⓘ |
| observedIn | optical wavelengths ⓘ |
| rightAscension | 18h 31m ⓘ |
| stellarPopulation | young stars ⓘ |
| visibleWith |
binoculars
ⓘ
small telescope ⓘ |
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.
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.
Subject: M25 Description of subject: M25 is a bright open star cluster in the constellation Sagittarius, visible with binoculars and often studied as a young stellar grouping in the Milky Way.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.