The space rock was too small to pose any danger.
, causing a spectacular fireball. A few small fragments would likely have made it to the planet's surface. According to Richard Moissl, ESA's head of planetary defense, the close pass will significantly alter the asteroid's trajectory due to Earth's gravitational pull. Astronomers have to date discovered over 30,000 near-Earth asteroids, space rocks that zoom through space in close proximity to Earth's orbit.
Out of these, only about 2,300 are considered potentially hazardous,An asteroid must be wider than 460 feet and follow an orbit that takes it within 20 lunar distances of Earth to receive the official"potentially hazardous" label. Even much smaller asteroids, however, would cause widespread destruction if they were to hit the planet.
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