The 19 - 41 metre wide asteroid 2014 UD57 made a close pass (4.2 lunar distances, 0.0107 AU) travelling at 9.05 km/second, to the Earth-Moon system on the 23rd October 2014 @ 02:51 UT ±00:01.
Orbital elements:
2014 UD57 Earth MOID = 0.0012 AU
Epoch 2014 Dec. 9.0 TT = JDT 2457000.5 MPC
M 55.90758 (2000.0) P Q
n 0.61748136 Peri. 119.48077 +0.89657874 +0.44283783
a 1.3657991 Node 214.23530 -0.41018749 +0.82483362
e 0.3502058 Incl. 0.65380 -0.16701132 +0.35148848
P 1.60 H 25.8 G 0.15 U 6