Tuna-Fish2 t1_jajnxop wrote
Reply to comment by curvebombr in NASA’s DART data validates kinetic impact as planetary defense method | DART altered the orbit of the asteroid moonlet Dimorphos by 33 minutes by mepper
In this case, it's just a measure of time. Dimorphos is in orbit around Didymos. This is why it was chosen as a target, because we can very accurately measure the difference in the length of it's orbit before and after collision.
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