Orbital elements:
2011 MZ2 Earth MOID = 0.0402 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 33.57667 (2000.0) P Q
n 0.50813060 Peri. 354.98212 +0.00877289 +0.99696220
a 1.5553178 Node 275.50543 -0.91472045 -0.02326687
e 0.3206552 Incl. 4.45924 -0.40399200 +0.07433049
P 1.94 H 25.5 G 0.15 U 8
The 21 - 46 metre wide asteroid 2011 MZ2 made a close pass (16.2 lunar distances, 0.0417 AU), travelling at 4.70 km/second, to the Earth-Moon system on the 21st June, 2011 @ 21:56 UT ±08:04.