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About two or three years ago I think a probe whose name I forgot has been crashed into an asteroid at high speed to see what would happen if we tried to collide something with an asteroid on Earth course. The asteroid the probe was crashed into had a moon as well. What were the results of the crash? Did the asteroid slow down? Did it change direction? What happened to its satellite?

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    $\begingroup$ There have been several missions to minor planets in the last decade; Hayabusa2 matches your timeline, and did use a kinetic impactor. Is that the one? $\endgroup$
    – HDE 226868
    Jul 11, 2021 at 14:47
  • $\begingroup$ @HDE226868 No, the DART's mission's descriptions matches exactly what I've meant (it's actually the asteroid's moon, not the primary body, that is to be targeted). I now think I heard about DART because of Hayabusa's successful landing with the sample. Someone in media then probably mentioned that a next goal would be to perform the asteroid impactor mission DART to test what would happen in such attempt. $\endgroup$
    – John
    Jul 11, 2021 at 15:46
  • $\begingroup$ @John DART impacted in 2022. You may be thinking of Osirus-REX or Deep Impact. $\endgroup$ Dec 14, 2022 at 16:42

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If you're thinking of the NASA DART mission (Double Asteroid Redirection Test), it hasn't launched yet. It's supposed to depart Earth between November 2021 and February 2022, and encounter 65803 Didymos and impact its satellite Dimorphos in September or October 2022.

DART is the first part of the AIDA collaboration (Asteroid Impact and Deflection Assessment). The second is the ESA Hera mission, planned to launch in 2024 and survey the Didymos system in 2026. Better answers to your questions will be available after that.

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