A Mile-Wide “Potentially Hazardous Asteroid” With Its Own Moon Whizzed Past Earth This Weekend
A 1.6 - kilometer - wide ( 1 - mile ) “ potentially risky ” asteroid scheme passed by Earth over the weekend . 1999 KW4is abinary system – two blank space object close enough in proximity to orbit each other – that was first discovered on May 20 , 1999 , by the Lincoln Near - Earth Asteroid Research ( LINEAR ) project in New Mexico . observation over the last two decades have mark the near - Earth object ( NEO ) as “ potentially hazardous ” give its minor chance of colliding with Earth ....