Asteroid Hitting Earth In 2025. After its discovery in 2004, asteroid 99942. An object larger than about 150 meters that can approach the earth to within this.

Though the risk remains low, nasa scientists have found that the asteroid bennu, shown here, has a higher chance of hitting earth in the next 300 years than thought. Estimated to be about 1,100 feet (340 meters) across, apophis quickly gained notoriety as an asteroid that could pose a serious threat to earth when astronomers predicted.