Asteroid 2021 AA flew past Earth at 0.6 LD
A newly-discovered asteroid designated 2021 AA flew past Earth at a distance of 0.62 LD / 0.00159 AU (237 860 km / 147 800 miles) from the center of our planet at 13:16 UTC on January 1, 2021. This is the first known asteroid to flyby Earth within 1 lunar distance…