20 metre wide Aten asteroid 2016 K0 discovered Discovered on the 28th of May 2016, 3 days after it made a close approach of our planet and moon, 20 metre sized Aten asteroid 2016 KO crawled past us at a minimum distance of 2.17 LD and a relative velocity of a mere 7.3 Km/s crossing the plane of the ecliptic S to N at an inclination of 6.4 degrees.2016-May-25 19:03 UTC Earth 0.00558 AU = 2.17