Canada to spot a 1.65-km asteroid during its closest approach since the 1600s

A roughly 1.65-kilometre asteroid (1997 NC1) will pass Earth on June 27 at about 2.5–2.6 million kilometres away—the closest approach since the 1600s—and may be visible from parts of Canada with a small telescope. The CSA says the flyby poses no risk; such events offer scientists a chance to study the asteroid’s size, shape and orbit, with NASA noting the next close approach isn’t until 2133.