The space agency released a raft of data on Tuesday to support its assessment, including new pictures from the Hubble Space Telescope and from a small Italian spacecraft that stood off from the impact by about 50km (30 miles).Before impact, the time taken for Dimorphos to make one circuit of its sibling was 11 hours and 55 minutes.The telescope evidence now indicates this orbital period has been reduced to 11 hours and 23 minutes - a change of 32 minutes.But if you wanted to do this in the future, you'd want to do it years in advance," commented Dr Nancy Chabot from the Johns Hopkins University Applied Physics Laboratory, which led the mission for Nasa."Warning time is really key here in order to enable this sort of asteroid deflection to be used in the future as part of a much larger planetary defence strategy.""