Although no human is known to have been killed directly by an impact, over 1000 people were injured by the Chelyabinsk meteor airburst event over Russia in 2013. In 2005 it was estimated that the chance of a single person born today dying due to an impact is around 1 in 200,000. The two to four-meter-sized asteroids , , 2018 LA, 2019 MO, and the suspected artificial satellite WT1190F are the only known objects to be detected before impacting the Earth.