the asteroids that cross the orbit of earth belong to a group called the
Asteroid Near-Earth asteroids, or NEAs, are asteroids that have orbits that pass close to that of Earth. Asteroids that actually cross Earth's orbital path are known as Earth-crossers. As of June 2016[update], 14,464 near-Earth asteroids are known[17] and the number over one kilometer in diameter is estimated to be 900–1,000.