Eagle Crater
E484839
Eagle Crater is a small impact crater on Mars that gained prominence as the landing site and initial exploration area of NASA’s Opportunity rover.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Eagle Crater canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4994060 — 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: Eagle Crater Context triple: [Opportunity, notableSiteExplored, Eagle Crater]
-
A.
Sherman Crater
Sherman Crater is a prominent volcanic crater on the south side of Mount Baker in Washington State, known for its active fumaroles and role in monitoring the volcano’s geothermal and eruptive activity.
-
B.
Aliamanu Crater
Aliamanu Crater is a tuff cone and volcanic crater on the island of Oʻahu in Hawaii, located inland near Honolulu and now largely surrounded by urban development and military housing.
-
C.
Kirkwood crater
Kirkwood crater is a lunar impact crater named in honor of American astronomer Daniel Kirkwood, known for his work on asteroid belt gaps.
-
D.
El Trébol crater
El Trébol crater is a volcanic crater located within Mexico’s Pinacate volcanic region, known for its distinctive circular form amid the area’s rugged lava fields and cinder cones.
-
E.
Glover Park crater
Glover Park crater is a volcanic explosion crater and public reserve located within Auckland’s volcanic field in New Zealand.
- 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: Eagle Crater Target entity description: Eagle Crater is a small impact crater on Mars that gained prominence as the landing site and initial exploration area of NASA’s Opportunity rover.
-
A.
Sherman Crater
Sherman Crater is a prominent volcanic crater on the south side of Mount Baker in Washington State, known for its active fumaroles and role in monitoring the volcano’s geothermal and eruptive activity.
-
B.
Aliamanu Crater
Aliamanu Crater is a tuff cone and volcanic crater on the island of Oʻahu in Hawaii, located inland near Honolulu and now largely surrounded by urban development and military housing.
-
C.
Kirkwood crater
Kirkwood crater is a lunar impact crater named in honor of American astronomer Daniel Kirkwood, known for his work on asteroid belt gaps.
-
D.
El Trébol crater
El Trébol crater is a volcanic crater located within Mexico’s Pinacate volcanic region, known for its distinctive circular form amid the area’s rugged lava fields and cinder cones.
-
E.
Glover Park crater
Glover Park crater is a volcanic explosion crater and public reserve located within Auckland’s volcanic field in New Zealand.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
Martian surface feature
ⓘ
impact crater ⓘ |
| accessedBy | airbag-assisted landing system of Opportunity ⓘ |
| associatedMission | Mars Exploration Rover mission NERFINISHED ⓘ |
| catalogedIn | USGS Gazetteer of Planetary Nomenclature NERFINISHED ⓘ |
| contains |
rock outcrop exposures along inner rim
ⓘ
rock outcrop named "Opportunity Ledge" NERFINISHED ⓘ |
| coordinateSystem | areocentric coordinates ⓘ |
| diameter | approximately 22 meters ⓘ |
| discoveredBy | Mars Exploration Rover Opportunity NERFINISHED ⓘ |
| entryEvent | Opportunity came to rest inside the crater after landing ⓘ |
| evidenceIndicates | past presence of liquid water in Meridiani Planum ⓘ |
| explorationStart | January 2004 ⓘ |
| exploredBy | Opportunity rover NERFINISHED ⓘ |
| floorMaterial | fine-grained regolith and exposed bedrock ⓘ |
| gainedProminenceAs | initial exploration site of Opportunity rover ⓘ |
| geologicContext | Noachian to Hesperian-aged terrains of Meridiani Planum ⓘ |
| imagedBy |
Navcam on Opportunity rover
NERFINISHED
ⓘ
Pancam on Opportunity rover NERFINISHED ⓘ |
| imagedFromOrbitBy |
Mars Global Surveyor
NERFINISHED
ⓘ
Mars Reconnaissance Orbiter NERFINISHED ⓘ |
| landingDateContext | Opportunity landed in January 2004 ⓘ |
| landingSiteOf |
Mars Exploration Rover B
NERFINISHED
ⓘ
Opportunity rover NERFINISHED ⓘ |
| locatedInRegion | Meridiani Planum NERFINISHED ⓘ |
| locatedOn | Mars NERFINISHED ⓘ |
| missionPhaseRole | initial landing and checkout site for Opportunity ⓘ |
| namedAfter | eagle (common noun, not a specific person) ⓘ |
| nearbyFeature |
Endurance Crater
NERFINISHED
ⓘ
Meridiani Planum plains NERFINISHED ⓘ |
| notableFor |
evidence of past water activity on Mars
ⓘ
hematite-rich spherules ("blueberries") ⓘ layered sedimentary rocks ⓘ |
| operatedBy | NASA ⓘ |
| planetaryBody | Mars NERFINISHED ⓘ |
| rimType | low rim ⓘ |
| scienceObjective |
search for evidence of past liquid water
ⓘ
study of Martian sedimentary processes ⓘ |
| scientificSignificance | key site for early Opportunity mission discoveries ⓘ |
| shape | nearly circular ⓘ |
| surfaceType | sedimentary outcrop exposures ⓘ |
| terrain | relatively flat plains with small impact features ⓘ |
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: Eagle Crater Description of subject: Eagle Crater is a small impact crater on Mars that gained prominence as the landing site and initial exploration area of NASA’s Opportunity rover.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Opportunity