| gptkbp:instanceOf | gptkb:satellite 
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                                | gptkbp:alsoKnownAs | gptkb:Opportunity 
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                                | gptkbp:communication | UHF relay via Mars orbiters X-band radio
 
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                                | gptkbp:countryOfOrigin | gptkb:United_States 
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                                | gptkbp:discoveredBy | gptkb:Hematite_spherules Clay minerals
 Evidence of past water
 
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                                | gptkbp:distance | 45.16 km 
 | 
                        
                            
                                | gptkbp:durationOnMars | 5111 sols 14 years, 138 days
 
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                                | gptkbp:endDate | 2018-06-10 
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                                | gptkbp:height | 1.5 m 
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                                | gptkbp:instrument | gptkb:Alpha_Particle_X-ray_Spectrometer_(APXS) gptkb:Mössbauer_spectrometer
 gptkb:Microscopic_Imager
 gptkb:Miniature_Thermal_Emission_Spectrometer_(Mini-TES)
 gptkb:Rock_Abrasion_Tool_(RAT)
 
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                                | gptkbp:landingDate | gptkb:Meridiani_Planum 2004-01-25
 
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                                | gptkbp:lastContact | 2018-06-10 
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                                | gptkbp:launchDate | 2003-07-07 
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                                | gptkbp:launchVehicle | gptkb:Delta_II_7925H 
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                                | gptkbp:length | 1.6 m 
 | 
                        
                            
                                | gptkbp:mass | 185 kg 
 | 
                        
                            
                                | gptkbp:mission | gptkb:Mars_Exploration_Rover_Mission 
 | 
                        
                            
                                | gptkbp:notableFeature | gptkb:Cape_York gptkb:Eagle_Crater
 gptkb:Marathon_Valley
 gptkb:Matijevic_Hill
 gptkb:Perseverance_Valley
 gptkb:Endeavour_Crater
 gptkb:Endurance_Crater
 gptkb:Victoria_Crater
 
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                                | gptkbp:notableProject | gptkb:John_Callas 
 | 
                        
                            
                                | gptkbp:operator | gptkb:NASA 
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                                | gptkbp:photo | gptkb:Hazard_Avoidance_Camera_(Hazcam) gptkb:Navigation_Camera_(Navcam)
 gptkb:Panoramic_Camera_(Pancam)
 
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                                | gptkbp:powerSource | Solar panels 
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                                | gptkbp:principalInvestigator | gptkb:Steve_Squyres 
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                                | gptkbp:status | Mission complete 
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                                | gptkbp:twinRover | gptkb:saint gptkb:MER-A
 
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                                | gptkbp:website | https://mars.nasa.gov/mer/ 
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                                | gptkbp:width | 2.3 m 
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                                | gptkbp:bfsParent | gptkb:Opportunity_Rover 
 | 
                        
                            
                                | gptkbp:bfsLayer | 6 
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                                | https://www.w3.org/2000/01/rdf-schema#label | MER-B 
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