At the higher end of that estimate, it indicates the asteroid is over three times the size of London’s Big Ben! NASA explained: “No one should be overly concerned about an Earth impact of an asteroid or comet. We need to first find them, then keep an eye on them.”If an asteroid is found to be on a collision course for Earth, NASA has several tactics up its sleeve to prevent a collision. “High speed neutrons from the explosion would irradiate a shell of material on the surface of the asteroid facing the explosion. The material in this surface shell would then expand and blow off, thus producing a recoil upon the asteroid itself.

Source: Daily Mirror June 19, 2020 12:40 UTC