108 metre wide Apollo asteroid 2016 GS2 made a slow (Vr 8 Km/s) close approach of our planet at 3.4 Lunar Distances on 2016-May-18 02:03 UTC

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/s
2016-May-17 12:28 UTC Moon 0.0089 AU = 3.4 LD Vr = 8.49 Km/s
2016-May-18 02:03 UTC Earth 0.0087 AU = 3.4 LD Vr = 8.01 Km/s
semi major axis 1.335 AU
inclination  3.85 deg
http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2016GS2