It was ‘roughly the same size as the asteroid that struck Chelyabinsk, Russia in 2013,’ meaning had it hit, the effects would have been similar. At that time it injured more than 1,000 people Its next close approach to Earth is expected on December 28, 2017. For years scientists have been trying to work out how to deal with the threat of an asteroid, which could hit us with little or no warning. Recently the White House has released an official document describing the plan if a meteor or asteroid was to head our way, and it shows we are under-prepared.Nasa is working on a series of missions including an asteroid redirect mission. the country is looking to collaborate with other nations in the future.