https://www.livescience.com/space/asteroids/2000-foot-wide-potentially-hazardous-asteroid-has-just-made-its-closest-approach-to-earth-and-you-can-see-it-with-a-telescope
The 2,000-foot-wide asteroid 2013 NK4 just made its closest approach to Earth in recorded history, sailing by at about eight lunar distances. You can still see the massive rock with a backyard telescope.
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