This is the seventh asteroid discovered prior to an Earth impact. When Sárneczky and other dedicated skygazers spot previously undiscovered asteroids, their observations go to the Minor Planet Center in Cambridge, Mass.
Software and astronomers at NASA and the European Space Agency then determine whether the object is a bona fide asteroid, and quickly establish where it may be going.
If this rock had been larger, asteroid-spotting systems could have been used to warn those in harm’s way, giving people a chance to find cover or flee.
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