CONTACT
via nbc:
"a spacecraft the size of a vending machine, slammed head-on with the football stadium-sized asteroid Dimorphos at a speed of 14,000 miles per hour to alter its orbit forever...
...the $325 million mission was designed to see whether “nudging” an asteroid can alter its trajectory...
...a camera aboard DART captured live views of Dimorphos’ getting bigger as the probe neared the asteroid. In the minutes before impact, the probe beamed back jaw-dropping details of the space rock’s craggy, uneven surface....
........it may take up to several weeks for NASA to confirm any changes in the space rock’s trajectory."
emphasis mine. a 14,000 mph target mind boggling. a mission of millimeters apparently