M41
E506491
M41 is an open star cluster in the constellation Canis Major, visible to the naked eye and notable for its bright, scattered stars.
All labels observed (1)
| Label | Occurrences |
|---|---|
| M41 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5259961 — 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: M41 Context triple: [Canis Major, contains, M41]
-
A.
M-45
M-45 is a state highway in Michigan that runs east–west through the Grand Rapids area toward the Lake Michigan shoreline.
-
B.
M-45
M-45 is a major ring road in the Madrid metropolitan area that helps divert traffic around the city and connect several eastern suburbs.
-
C.
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.
-
D.
M44
M44 is an open star cluster in the constellation Cancer, also known as the Beehive Cluster or Praesepe, and is one of the nearest and most prominent clusters visible to the naked eye.
-
E.
M51 Isherman
The M51 Isherman is an Israeli-upgraded version of the Sherman tank, fitted with a powerful 105 mm gun and modernized systems for improved performance in mid-20th-century conflicts.
- 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: M41 Target entity description: M41 is an open star cluster in the constellation Canis Major, visible to the naked eye and notable for its bright, scattered stars.
-
A.
M-45
M-45 is a state highway in Michigan that runs east–west through the Grand Rapids area toward the Lake Michigan shoreline.
-
B.
M-45
M-45 is a major ring road in the Madrid metropolitan area that helps divert traffic around the city and connect several eastern suburbs.
-
C.
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.
-
D.
M44
M44 is an open star cluster in the constellation Cancer, also known as the Beehive Cluster or Praesepe, and is one of the nearest and most prominent clusters visible to the naked eye.
-
E.
M51 Isherman
The M51 Isherman is an Israeli-upgraded version of the Sherman tank, fitted with a powerful 105 mm gun and modernized systems for improved performance in mid-20th-century conflicts.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf | open star cluster ⓘ |
| alternativeName |
Caldwell 64
NERFINISHED
ⓘ
Messier 41 NERFINISHED ⓘ NGC 2287 NERFINISHED ⓘ |
| angularSize | 38 arcminutes ⓘ |
| apparentMagnitudeV | 4.5 ⓘ |
| approximateAge | about 190 million years ⓘ |
| bestSeenFromHemisphere |
Southern Hemisphere
NERFINISHED
ⓘ
low northern latitudes ⓘ |
| cataloguedBy | Charles Messier NERFINISHED ⓘ |
| catalogueNumber |
Caldwell 64
NERFINISHED
ⓘ
M41 ⓘ NGC 2287 NERFINISHED ⓘ |
| concentrationClass | Trumpler class I3r NERFINISHED ⓘ |
| containsStarType |
B-type main-sequence stars
ⓘ
red giant stars ⓘ |
| coreRadius | about 4.4 light-years ⓘ |
| declination | −20° 44′ ⓘ |
| discoveredBy | Giovanni Batista Hodierna NERFINISHED ⓘ |
| discovererNationality | Italian ⓘ |
| discoveryYear | before 1654 ⓘ |
| distanceFromEarth |
about 2300 light-years
ⓘ
about 700 parsecs ⓘ |
| estimatedNumberOfStars | about 100 ⓘ |
| galacticLatitude | −20.7 degrees ⓘ |
| galacticLongitude | 227.1 degrees ⓘ |
| galacticPopulation | thin disk ⓘ |
| hasColorIndexBminusV | +0.23 ⓘ |
| includedInCatalogue |
Caldwell Catalogue
NERFINISHED
ⓘ
Messier Catalogue NERFINISHED ⓘ New General Catalogue NERFINISHED ⓘ |
| liesSouthOfStar | Sirius NERFINISHED ⓘ |
| locatedInConstellation | Canis Major NERFINISHED ⓘ |
| locatedInGalaxy | Milky Way NERFINISHED ⓘ |
| metallicityRelativeToSun | near-solar ⓘ |
| notableFor |
bright scattered stars
ⓘ
prominent red giant near center ⓘ |
| observedInWavelength |
infrared
ⓘ
optical ⓘ |
| observingSeason | winter in Northern Hemisphere ⓘ |
| rightAscension | 06h 46m ⓘ |
| separationFromSirius | about 4 degrees ⓘ |
| tidalRadius | about 25 light-years ⓘ |
| visibleToNakedEye | true ⓘ |
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: M41 Description of subject: M41 is an open star cluster in the constellation Canis Major, visible to the naked eye and notable for its bright, scattered stars.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.