Problem with an impactor (besides any trailing analytical probes being sandblasted by ejecta) is that its a permanent expirement that can screw up any future pa

Problem with an impactor (besides any trailing analytical probes being sandblasted by ejecta) is that its a permanent expirement that can screw up any future passive observational experiments That being said, if we do eventually find another retrograde asteroid that is otherwise unremarkable, I would be all for an extreme speed impact experiment. If it's close enough to the sun we may even get some low grade relativistic effects being observed