Next week, a large (200-450m) #asteroid will approach earth to within 3.8 lunar distances (<1.5 million km), becoming visible in amateur telescopes later this week, reaching mag <12 at closest approach.
See https://t.co/j7fUuJRXIp pic.twitter.com/pe8Xtcxxbm

— Gideon van Buitenen (@giddgvb) March 1, 2018