Messier crater on the Moon
E457109
Messier crater on the Moon is a distinctive, elongated lunar impact crater in Mare Fecunditatis, notable for its unusual shape and bright ray system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Messier crater on the Moon canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4648573 — 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 crater on the Moon Context triple: [Charles Messier, astronomicalObjectNamedAfter, Messier crater on the Moon]
-
A.
McNair crater on the Moon
McNair crater on the Moon is a lunar impact crater named in honor of astronaut and physicist Ronald McNair, one of the crew members who died in the 1986 Space Shuttle Challenger disaster.
-
B.
Copernicus Crater on the Moon
Copernicus Crater on the Moon is a prominent, relatively young lunar impact crater in the Moon’s eastern Oceanus Procellarum region, named in honor of the Renaissance astronomer Nicolaus Copernicus.
-
C.
Lomonosov crater on the Moon
Lomonosov crater on the Moon is a lunar impact crater named in honor of Russian polymath Mikhail Lomonosov, recognized for its location on the Moon’s far side and its relatively well-preserved structure.
-
D.
Gilbert crater on the Moon
Gilbert crater on the Moon is a lunar impact crater named in honor of American geologist Grove Karl Gilbert, recognized for his pioneering work in geomorphology and planetary science.
-
E.
Hale crater on the Moon
Hale crater on the Moon is a lunar impact crater named in honor of American solar astronomer George Ellery Hale.
- 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 crater on the Moon Target entity description: Messier crater on the Moon is a distinctive, elongated lunar impact crater in Mare Fecunditatis, notable for its unusual shape and bright ray system.
-
A.
McNair crater on the Moon
McNair crater on the Moon is a lunar impact crater named in honor of astronaut and physicist Ronald McNair, one of the crew members who died in the 1986 Space Shuttle Challenger disaster.
-
B.
Copernicus Crater on the Moon
Copernicus Crater on the Moon is a prominent, relatively young lunar impact crater in the Moon’s eastern Oceanus Procellarum region, named in honor of the Renaissance astronomer Nicolaus Copernicus.
-
C.
Lomonosov crater on the Moon
Lomonosov crater on the Moon is a lunar impact crater named in honor of Russian polymath Mikhail Lomonosov, recognized for its location on the Moon’s far side and its relatively well-preserved structure.
-
D.
Gilbert crater on the Moon
Gilbert crater on the Moon is a lunar impact crater named in honor of American geologist Grove Karl Gilbert, recognized for his pioneering work in geomorphology and planetary science.
-
E.
Hale crater on the Moon
Hale crater on the Moon is a lunar impact crater named in honor of American solar astronomer George Ellery Hale.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
lunar impact crater
ⓘ
named lunar surface feature ⓘ |
| albedoContrast | high against Mare Fecunditatis ⓘ |
| bestSeenAt | low Sun angle ⓘ |
| catalogInclusion | listed in standard lunar crater catalogs ⓘ |
| colongitude | 304 ⓘ |
| coordinateSystem | selenographic coordinates ⓘ |
| depth | ~2.0 km ⓘ |
| diameter | ~11 km ⓘ |
| discovery | visible since early telescopic observations ⓘ |
| elongationDirection | east–west ⓘ |
| floorAlbedo | high ⓘ |
| formationProcess | oblique impact ⓘ |
| geologicalContext | Mare basalt surface ⓘ |
| hasCompanionCrater | Messier A (lunar crater) NERFINISHED ⓘ |
| hasEjecta | highly directional ejecta blanket ⓘ |
| hemisphere | eastern lunar hemisphere ⓘ |
| IAUNameStatus | approved ⓘ |
| interior | relatively smooth floor ⓘ |
| length | ~11 km ⓘ |
| locatedIn |
Mare Fecunditatis
NERFINISHED
ⓘ
lunar near side ⓘ |
| locatedOn | Moon NERFINISHED ⓘ |
| lunarMareAssociation | Mare Fecunditatis ray crater ⓘ |
| morphologicalType | impact crater ⓘ |
| namedAfter | Charles Messier NERFINISHED ⓘ |
| neighboringFeature |
Mare Fecunditatis basalt plains
ⓘ
Messier A (lunar crater) NERFINISHED ⓘ |
| observationalInterest | popular target for amateur astronomers ⓘ |
| observationWavelength | visible light ⓘ |
| quadrant | lunar near-side southeast quadrant ⓘ |
| rayBrightness | high relative to surrounding mare ⓘ |
| rayOrientation | westward ⓘ |
| rayPairAssociation | Messier–Messier A ray system NERFINISHED ⓘ |
| raySystem |
asymmetric
ⓘ
bright ⓘ |
| rimCondition | sharp ⓘ |
| scientificInterest | example of oblique impact dynamics ⓘ |
| selenographicLatitude | 1.9° S ⓘ |
| selenographicLongitude | 47.6° E ⓘ |
| shape | elongated ⓘ |
| surfaceAge | relatively young Copernican-age feature ⓘ |
| surfaceFeatureType | crater with rays ⓘ |
| surfaceTexture | fresh, relatively uneroded morphology ⓘ |
| visibilityFromEarth | easily observable with small telescopes ⓘ |
| width | ~8 km ⓘ |
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: Messier crater on the Moon Description of subject: Messier crater on the Moon is a distinctive, elongated lunar impact crater in Mare Fecunditatis, notable for its unusual shape and bright ray system.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.