Highest resolution satellite map of a planetary body

The highest resolution global mosaic of a planetary body is the Bennu Global Mosaic, which shows the surface of the asteroid 101955 Bennu at a resolution of 5 cm (2 inches) per pixel. This composite satellite map was stitched together from 2,155 images taken by the PolyCam instrument on NASA's OSIRIS-REx spacecraft between 7 March and 19 April 2019. The Bennu Global Mosaic was published on 26 February 2020.

This extremely high resolution was possible because of the incredibly low orbit that OSIRIS-REx was placed in during the imaging process – just 3,100 to 5,000 m (1.9 to 3.1 miles). A feat only possible around tiny solar system bodies like this c. 500-m wide rubble-pile asteroid, which has no atmosphere.

The Lunar reconnaissance Orbiter has mapped the entire moon with a minimum resolution of 328 ft (99.97 m) per pixel. Most of the surface of Mars has been mapped to a resolution of 20 feet (6 m) per pixel.

The highest resolution commercial mapping satellites in orbit around Earth have a resolution of as little as 30 cm per pixel, but only a fraction of the planet's surface has been imaged at this resolution. Spy satellites such as the United States National Reconnaissance Agency's KH-11 series have a resolution of roughly 10 cm per pixel (based on a classified satellite image released by President Donald Trump in August 2019), but these satellites have imaged an even smaller area of the planet.