3 MILE wide asteroid Florence is set to graze past Earth on Sept 1, 2017- 2012 TC4 even closer

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TC4 2012: 3 MILE wide asteroid Florence is among the largest near-Earth asteroids that are several miles is size; measurements from NASA’s Spitzer Space Telescope and NEOWISE mission indicate it’s about 2.7 miles (4.4 kilometers) in size.

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