Opportunity Mars Rover Passes Marathon Distance

March 27, 2015
Source:  NASA/JPL


Cumulative driving by NASA’s Mars Exploration Rover Opportunity surpassed marathon distance on March 24, 2015, as the rover neared a destination called “Marathon Valley,” which is middle ground of this dramatic view from early March. Credit:  NASA/JPL-Caltech.

There was no tape draped across a finish line, but NASA is celebrating a win. The agency’s Mars Exploration Rover Opportunity completed its first Red Planet marathon on March 24 — 42.195 kilometers (26.219 miles) — with a finish time of roughly 11 years and 2 months.

“This is the first time any human enterprise has exceeded the distance of a marathon on the surface of another world,” said John Callas, Opportunity project manager at NASA’s Jet Propulsion Laboratory (JPL) in Pasadena, California. “A first time happens only once.”

The rover team at JPL plans a marathon-length relay run at the laboratory next week to celebrate.

The long-lived rover surpassed the marathon mark during a drive of 46.5 meters (153 feet). Last year, Opportunity became the long-distance champion of all off-Earth vehicles when it topped the previous record set by the former Soviet Union’s Lunokhod 2 Moon rover.

“This mission isn’t about setting distance records, of course; it’s about making scientific discoveries on Mars and inspiring future explorers to achieve even more,” said Steve Squyres, Opportunity principal investigator at Cornell University in Ithaca, New York. “Still, running a marathon on Mars feels pretty cool.”

Opportunity’s original three-month prime mission in 2004 yielded evidence of environments with liquid water soaking the ground and flowing on planet’s surface. As the rover continued to operate far beyond expectations for its lifespan, scientists chose the rim of Endeavour Crater as a long-term destination. Since 2011, examinations of Endeavour’s rim have provided information about ancient wet conditions less acidic, and more favorable for microbial life, than the environment that left clues found earlier in the mission.

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Spirit and Opportunity:  Mars Exploration Rovers

Mars Exploration Rovers


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Last updated March 27, 2015