On May 15, 2013, which corresponds to Sol – as in Martian day – 3,309 of its mission, the Mars Rover Opportunity has set the record for the driving distance covered by a NASA vehicle on another world. The previous record belonged to the Lunar Roving Vehicle driven by astronauts Eugene Cernan and Harrison Schmitt on the Moon during the Apollo 17 mission in December 1972 with 35.744 km ((22.210 statute miles).