Keeler (lunar crater)
E191003
Keeler (lunar crater) is a small impact crater on the Moon named in honor of American astronomer James Edward Keeler, known for his work on planetary rings and spectroscopy.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Keeler (Martian crater) | 1 |
| Keeler (lunar crater) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1691832 — 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: Keeler (lunar crater) Context triple: [James Edward Keeler, hasNamesake, Keeler (lunar crater)]
-
A.
Kepler (lunar crater)
Kepler (lunar crater) is a prominent, relatively young impact crater on the Moon’s near side, noted for its bright ray system and association with the astronomer Johannes Kepler.
-
B.
Baade lunar crater
Baade lunar crater is a large impact feature on the Moon’s far side named in honor of German astronomer Walter Baade.
-
C.
Kepler (Martian crater)
Kepler (Martian crater) is an impact crater on Mars named in honor of the German astronomer Johannes Kepler.
-
D.
Ernst Mach crater
Ernst Mach crater is a large impact crater on the Moon’s far side named in honor of the Austrian physicist and philosopher Ernst Mach.
-
E.
Schwarzschild crater
Schwarzschild crater is a large impact crater on the far side of the Moon, notable for its heavily eroded rim and complex interior features.
- 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: Keeler (lunar crater) Target entity description: Keeler (lunar crater) is a small impact crater on the Moon named in honor of American astronomer James Edward Keeler, known for his work on planetary rings and spectroscopy.
-
A.
Kepler (lunar crater)
Kepler (lunar crater) is a prominent, relatively young impact crater on the Moon’s near side, noted for its bright ray system and association with the astronomer Johannes Kepler.
-
B.
Baade lunar crater
Baade lunar crater is a large impact feature on the Moon’s far side named in honor of German astronomer Walter Baade.
-
C.
Kepler (Martian crater)
Kepler (Martian crater) is an impact crater on Mars named in honor of the German astronomer Johannes Kepler.
-
D.
Ernst Mach crater
Ernst Mach crater is a large impact crater on the Moon’s far side named in honor of the Austrian physicist and philosopher Ernst Mach.
-
E.
Schwarzschild crater
Schwarzschild crater is a large impact crater on the far side of the Moon, notable for its heavily eroded rim and complex interior features.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
lunar impact crater
ⓘ
lunar surface feature ⓘ |
| belongsToCategory | Craters on the Moon ⓘ |
| celestialBody | Moon ⓘ |
| eponym | James Edward Keeler ⓘ |
| featureType | impact crater ⓘ |
| hasCoordinateSystem | selenographic coordinates ⓘ |
| hasEnvironment |
airless
ⓘ
vacuum ⓘ |
| hasIllumination | sunlight-dependent ⓘ |
| hasOrigin | impact event ⓘ |
| hasShape | circular ⓘ |
| honors | James Edward Keeler ⓘ |
| interiorCharacteristic | relatively featureless floor ⓘ |
| isMappedIn | lunar atlases ⓘ |
| isObservedBy | lunar orbiters ⓘ |
| isSmallerThan | major lunar basins ⓘ |
| isSubjectOf | lunar geological studies ⓘ |
| locatedOn |
Moon
ⓘ
lunar far side ⓘ |
| namedAfter | James Edward Keeler ⓘ |
| namingAuthority | International Astronomical Union ⓘ |
| rimCondition | well-defined ⓘ |
| surfaceCharacteristic | heavily cratered surroundings ⓘ |
| surfaceMaterial | lunar regolith ⓘ |
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: Keeler (lunar crater) Description of subject: Keeler (lunar crater) is a small impact crater on the Moon named in honor of American astronomer James Edward Keeler, known for his work on planetary rings and spectroscopy.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Keeler (Martian crater)