Big asteroid 1998 OR2 seen in radar imagery ahead of fly-by

Arecibo Observatory observed asteroid (52768) 1998 OR2 on April 18, 2020. The space rock s closest approach to Earth will be about 3.9 million miles (6.3 million km) away on April 29. Story: Big asteroid shows itself ahead of Earth flyby on April 29: https://www.space.com/asteroid-1998-or2-photo-arecibo-observatory-april-2020.html 1998 OR has an estimated diameter of 1.1 to 2.5 miles (1.8 to 4.1 km). Credit: Arecibo Observatory/NASA/NSF / mash mix by Space.com s Steve Spaleta (http://www.twitter.com/stevespaleta)