Asteroid 2017 SU17 flew past Earth at 0.72 LD, two days before discovery
A newly discovered asteroid designated 2017 SU17 flew past Earth at 0.72 LD (~ 276 480 km / 171 796 miles) at 08:12 UTC on September 24, 2017. This is now the second known asteroid to flyby Earth within 1 LD on September 24, and the 34th since the start of the year,…