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: 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 ’s Steve Spaleta (