Asteroid 2018 CS1 flew past Earth at 0.90 LD, 3 days before discovery

Asteroid 2018 CS1 flew past Earth at 0.90 LD, 3 days before discovery

A newly discovered asteroid designated 2018 CS1 flew past Earth at a distance of 0.90 LD / 0.00230 (~ 344 075 km / 213 798 miles) on February 4, 2018, 3 days before it was first observed. A total of 13 known asteroids flew past us within 1 lunar distance since the…