NASA’s Mars Reconnaissance Orbiter uses the most powerful telescopes ever sent to Mars, while scouring the martian surface, the orbiter coincidentally caught Curiosity traversing through a mountainous region.
The rover is climbing up Mount Sharp en-route to it’s next scientific destination. You can see it as the blue smudge that appears against a background of rocks and sand. The image captured is an enhanced-color image from the High Resolution Imaging Science Experiment (HiRISE) camera and was initially taken on June 5, 2017.
At the time Curiosity was investigating sand dunes on Mount Sharp and was travelling to it’s next mission which would see it examine ‘outcrops where hematite has been identified from Mars orbit’ – the Vera Rubin Ridge.