Launched on November 2021, DART is a test of an asteroid deflection. The DART mission is NASA's demonstration of kinetic impactor technology, impacting an asteroid to adjust its speed and path.
The target asteroid is Dimorphos, the satellite of (65803) Didymos. Dimorphos has been impacted on September 26, 2022. Earthbased observations will be made afterward to detect the deflection of Dimorphos' orbit.