The 18 - 41 metre wide asteroid 2015 EX made a close pass (1.4 LD, 0.0037 AU) travelling at 10.62 km/second, to the Earth-Moon system on the 8th March 2015 @ 16:17 UT ±00:01.
Orbital elements:
2015 EX Earth MOID = 0.0038 AU
Epoch 2015 June 27.0 TT = JDT 2457200.5 MPC
M 65.64048 (2000.0) P Q
n 0.44779219 Peri. 130.49112 -0.49488445 -0.86862674
a 1.6920702 Node 349.09427 +0.75391045 -0.41545337
e 0.4750466 Incl. 7.29393 +0.43209769 -0.26997421
P 2.20 H 25.8 G 0.15 U 6