Arecibo Observatory returns from tropical storm Isaias lockdown to track asteroid for NASA

Arecibo’s Planetary Radar Group quickly shift from storm response to track asteroid 2020 NK1. Before the Arecibo observations, 2020 NK1 was calculated to be one of the biggest threats out of all known asteroids on NASA’s list of potential impactors, with about one chance in 70,000 of impacting the Earth between 2086 and 2101.