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The approaching asteroid is known as 7482 (1994 PC1) and it was discovered in 1994, according to NASA.
Nobody expects 7482 (1994 PC1) to hit Earth, but it’s the closest the asteroid will come for the next two centuries, according to NASA projections. The flyby is expected to take place on Tuesday January 18 at 4.51 p.m. ET.
It won’t be the largest asteroid to ever sweep past Earth. That honor belongs to the asteroid 3122 Florence (1981 ET3), which flew by and missed colliding with Earth on September 1, 2017. That asteroid is estimated to be between 2.5 miles and 5.5 miles wide, and it make another pass again on September 2, 2057.