Opportunity rover
E112200
Opportunity rover was a NASA robotic rover that conducted a long-duration geological and atmospheric exploration mission on the surface of Mars as part of the Mars Exploration Rover program.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Mars Exploration Rover Opportunity | 13 |
| Opportunity rover canonical | 5 |
| MER-B Opportunity | 2 |
| Mars Exploration Rover – B | 2 |
| Opportunity operated for nearly 15 Earth years | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T934006 — 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: Opportunity rover Context triple: [Mars, exploredBy, Opportunity rover]
-
A.
Spirit rover
Spirit rover was a NASA robotic exploration vehicle that conducted geological studies on the surface of Mars as part of the Mars Exploration Rover mission.
-
B.
Curiosity rover
Curiosity rover is a NASA Mars rover designed to explore the Gale Crater, study the planet’s climate and geology, and assess whether Mars ever had environmental conditions suitable for microbial life.
-
C.
Mars Science Laboratory
Mars Science Laboratory is a NASA mission that delivered and operates the Curiosity rover to study Mars’s geology and climate and assess its past habitability.
-
D.
Perseverance rover
Perseverance rover is NASA's Mars rover designed to search for signs of ancient life, collect rock and soil samples, and test new technologies for future human exploration of the Red Planet.
-
E.
MAHLI
MAHLI is a high-resolution, focusable color camera on NASA's Curiosity rover used to capture detailed close-up images of Martian rocks, soil, and textures for geological analysis.
- 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: Opportunity rover Target entity description: Opportunity rover was a NASA robotic rover that conducted a long-duration geological and atmospheric exploration mission on the surface of Mars as part of the Mars Exploration Rover program.
-
A.
Spirit rover
Spirit rover was a NASA robotic exploration vehicle that conducted geological studies on the surface of Mars as part of the Mars Exploration Rover mission.
-
B.
Curiosity rover
Curiosity rover is a NASA Mars rover designed to explore the Gale Crater, study the planet’s climate and geology, and assess whether Mars ever had environmental conditions suitable for microbial life.
-
C.
Mars Science Laboratory
Mars Science Laboratory is a NASA mission that delivered and operates the Curiosity rover to study Mars’s geology and climate and assess its past habitability.
-
D.
Perseverance rover
Perseverance rover is NASA's Mars rover designed to search for signs of ancient life, collect rock and soil samples, and test new technologies for future human exploration of the Red Planet.
-
E.
MAHLI
MAHLI is a high-resolution, focusable color camera on NASA's Curiosity rover used to capture detailed close-up images of Martian rocks, soil, and textures for geological analysis.
- F. None of above. chosen
Statements (66)
| Predicate | Object |
|---|---|
| instanceOf |
Mars rover
ⓘ
NASA space probe ⓘ robotic spacecraft ⓘ |
| actualMissionDuration |
5111 sols
ⓘ
about 14.5 Earth years ⓘ |
| alsoKnownAs |
MER-B
ⓘ
Opportunity rover ⓘ
surface form:
MER-B Opportunity
Opportunity rover ⓘ |
| arrivalAtMarsDate | 2004-01-25 ⓘ |
| causeOfMissionEnd | global dust storm leading to loss of power ⓘ |
| communicationSystem | X-band radio ⓘ |
| communicationWithEarth | via Deep Space Network ⓘ |
| computer | RAD6000 ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| distanceTraveled | about 45.16 kilometers ⓘ |
| height | 1.5 meters ⓘ |
| heritage | based on Mars Pathfinder rover design ⓘ |
| instrument |
X-ray Spectrometer
ⓘ
surface form:
Alpha Particle X-ray Spectrometer
Hazard Avoidance Cameras ⓘ Microscopic Imager ⓘ Miniature Thermal Emission Spectrometer ⓘ Mössbauer Spectrometer ⓘ Navigation Cameras ⓘ Panoramic Camera ⓘ Rock Abrasion Tool ⓘ |
| landingBody | Mars ⓘ |
| landingDate | 2004-01-25 ⓘ |
| landingSite | Meridiani Planum ⓘ |
| lastContactDate | 2018-06-10 ⓘ |
| launchDate | 2003-07-08 ⓘ |
| launchSite | Cape Canaveral Air Force Station Space Launch Complex 17B ⓘ |
| launchVehicle |
Delta rocket
ⓘ
surface form:
Delta II 7925H
|
| length | 1.6 meters ⓘ |
| manufacturer | Jet Propulsion Laboratory ⓘ |
| mass | approximately 185 kilograms ⓘ |
| mission |
Mars Exploration Rover mission
ⓘ
surface form:
Mars Exploration Rover program
|
| missionEndDeclaredByNASA | 2019-02-13 ⓘ |
| missionType |
atmospheric exploration
ⓘ
geological exploration ⓘ planetary rover ⓘ |
| notableDiscovery |
geological evidence of past liquid water on Mars
ⓘ
hematite-rich spherules nicknamed "blueberries" ⓘ |
| notableFeature | solar-powered six-wheeled rover ⓘ |
| notableSiteExplored |
Eagle Crater
ⓘ
Endeavour Crater ⓘ Endurance Crater ⓘ Victoria Crater ⓘ |
| officialName |
Opportunity rover
self-linksurface differs
ⓘ
surface form:
Mars Exploration Rover – B
|
| operator | NASA ⓘ |
| plannedMissionDuration | 90 sols ⓘ |
| power | approximately 140 watts on Mars ⓘ |
| powerSource | solar panels ⓘ |
| primaryCamera | Panoramic Camera (Pancam) ⓘ |
| primaryRelayOrbiters |
Mars Express
ⓘ
Mars Odyssey mission ⓘ
surface form:
Mars Odyssey
Mars Reconnaissance Orbiter ⓘ |
| primaryScienceGoal | search for evidence of past water activity on Mars ⓘ |
| program |
Mars Exploration Rover mission
ⓘ
surface form:
Mars Exploration Rover program
|
| record | longest distance driven on another world by a wheeled vehicle ⓘ |
| spaceAgency | NASA ⓘ |
| status | mission complete ⓘ |
| surfaceBody | Mars ⓘ |
| team |
Mars Exploration Rover mission
ⓘ
surface form:
Mars Exploration Rover science team
|
| twinRover | Spirit ⓘ |
| wheelCount | 6 ⓘ |
| width | 2.3 meters ⓘ |
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: Opportunity rover Description of subject: Opportunity rover was a NASA robotic rover that conducted a long-duration geological and atmospheric exploration mission on the surface of Mars as part of the Mars Exploration Rover program.
Referenced by (23)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Opportunity operated for nearly 15 Earth years
subject surface form:
Opportunity
this entity surface form:
Mars Exploration Rover – B
subject surface form:
Opportunity
this entity surface form:
MER-B Opportunity
subject surface form:
Opportunity
subject surface form:
Delta II
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover – B
this entity surface form:
MER-B Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity
this entity surface form:
Mars Exploration Rover Opportunity