Credit jpl nasa orbit diagrams  Discovered on the 31st of March this year, 108 metre wide Apollo asteroid 2016 GS2 made a close approach of our moon and planet.May 18th 2016 close approach 2016GS2 108 metres at 3.4 LD , relative velocity 8 Km/s2016-May-17 12:28 UTC Moon 0.0089 AU = 3.4 LD Vr = 8.49 Km/s2016-May-18 02:03 UTC Earth 0.0087 AU = 3.4 LD Vr = 8.01 Km/ssemi major axis 1.335