On Earth, 28 miles can be an ordinary drive. On Mars, it is now a record. NASA’s Perseverance rover reached a total of 28.10 miles (45.22 kilometers) on October 11, passing the 28.06 miles (45.16 kilometers) accumulated by Opportunity.
The milestone took Perseverance about five and a half years. Opportunity spent almost 15 years building its total. NASA announced the new record on October 12, and added the rover’s record-day photograph to its Photojournal on October 13.
A robot that can choose its way around a rock
Perseverance’s AutoNav system photographs the terrain as it moves, turns those images into a three-dimensional hazard map, and works out a path between waypoints chosen by planners on Earth. NASA says more than 90% of its total driving distance has used AutoNav to evaluate the terrain. For Opportunity and its twin, Spirit, the figure was about 5%.
Those numbers describe a useful division of labor. People choose where they want the mission to go; the rover handles much of the immediate business of getting around obstacles. A distant team does not have to plot every adjustment to every wheel.
Ingenuity left behind a useful computer
Driving around hazards is only part of the problem. A rover also needs to know where it has ended up, and Mars has no GPS satellite network.
In a February 2026 technical update, NASA explained another improvement: Mars Global Localization. It compares navigation-camera panoramas with orbital terrain maps stored aboard Perseverance. NASA reported that the process takes about two minutes and locates the rover to within roughly 10 inches, or 25 centimeters.
The software runs on hardware with an unexpectedly familiar history. Its processor is inside the base station Perseverance once used to communicate with the retired Ingenuity helicopter. That computer uses a commercial chip of the kind found in mid-2010s smartphones, running more than 100 times faster than the rover’s radiation-tolerant main computers.
Repurposing that hardware gave the mission a way to address accumulating errors in its position estimates. Earlier, those errors could make the rover stop and wait for Earth to confirm it was safe to continue.
The photograph from the record drive
The navigation-camera image released by NASA shows tracks pressed into uneven ground, with rocks scattered along the route. It was taken on the mission’s 2,006th Martian day. That day’s drive covered 91.31 meters, enough to move Perseverance past Opportunity’s lifetime total.
The tracks make the achievement tangible. Every stretch of ground is a real surface the machine had to cross, with decisions about traction, rocks and safe passage. The result is a robot explorer that can spend more of its working day getting somewhere worth studying.
Image: Perseverance navigation-camera photograph, October 11, 2026. Courtesy NASA/JPL-Caltech. Original image and credit.
