NASA will impact a small asteroid with a spacecraft and measure changes in its orbit around a larger asteroid:
The first-ever mission to demonstrate an asteroid deflection technique for planetary defense -- the Double Asteroid Redirection Test (DART) -- is moving from concept development to preliminary design phase, following NASA's approval on June 23.
"DART would be NASA's first mission to demonstrate what's known as the kinetic impactor technique -- striking the asteroid to shift its orbit -- to defend against a potential future asteroid impact," said Lindley Johnson, planetary defense officer at NASA Headquarters in Washington. "This approval step advances the project toward an historic test with a non-threatening small asteroid."
While current law directs the development of the DART mission, DART is not identified as a specific budget item in the Administration's Fiscal Year 2018 budget.
The target for DART is an asteroid that will have a distant approach to Earth in October 2022, and then again in 2024. The asteroid is called Didymos -- Greek for "twin" -- because it's an asteroid binary system that consists of two bodies: Didymos A, about one-half mile (780 meters) in size, and a smaller asteroid orbiting it called Didymos B, about 530 feet (160 meters) in size. DART would impact only the smaller of the two bodies, Didymos B.
https://en.wikipedia.org/wiki/65803_Didymos
Related: https://www.nas.nasa.gov/publications/articles/feature_asteroid_simulations.html
(Score: 2) by takyon on Monday July 03 2017, @11:30PM
It's unlikely to hit Earth. Ever. But if you don't practice these techniques now, there won't be any deflections later.
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