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The spacecraft is small and boxy, and it will hit Dimorphos at an impressive 14,760 mph, sped along by its NEXT xenon ion thruster engine
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An onboard camera and autonomous navigation software will guide DART to its self-sacrifice into the asteroid, which will change the speed of the asteroid’s orbit around the main asteroid by a fraction of a percent. But that should affect the orbital period by several minutes, all of which will be confirmed
Illustration: Ted Lopez / Johns Hopkins APL
DART won’t arrive at the asteroid pair until next September or so, which means you have plenty of time to figure out how to get close if you want a ringside seat.
The ability to deflect an asteroid could one day prove to be absolutely crucial to the safety of everything living on Earth. While, so far, NASA does not predict an asteroid of significant size hitting Earth in the next century or so, there have been 1,200 meteor impacts to Earth from asteroids over three feet in length since 1988, and only 0.42 percent of those—five—were actually predicted in advance.
So, it’s not exactly like we have a really solid handle on this whole asteroid-prediction thing, and figuring out a way to be ready to deflect something would really be a great idea. Ideally, if this test works, a similar deflecting spacecraft will be made available and be ready to go, should the situation arise in the future.
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NASA Is Going To Try To Re-Direct The Path Of An Asteroid By Crashing A Spacecraft Into It - Jalopnik
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