Orbital elements:
2011 OR15 PHA, Earth MOID = 0.0391 AU
Epoch 2013 Apr. 18.0 TT = JDT 2456400.5 MPC
M 256.47657 (2000.0) P Q
n 0.46268339 Peri. 250.96249 +0.79508229 -0.60454885
a 1.6555671 Node 146.18397 +0.58412625 +0.74170647
e 0.4430443 Incl. 5.01291 +0.16321972 +0.29050335
P 2.13 H 21.0 G 0.15 U 1
Orbital elements:
2011 OR15 PHA, Earth MOID = 0.0386 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5 MPC
M 338.86669 (2000.0) P Q
n 0.46188357 Peri. 251.23450 +0.79202809 -0.60852868
a 1.6574777 Node 146.19884 +0.58795283 +0.73882204
e 0.4454908 Incl. 5.03556 +0.16432581 +0.28954246
P 2.13 H 21.7 G 0.15 U 9
The 160 - 350 metre wide asteroid 2011 OR15 will make a close pass (60.4 lunar distances, 0.1552 AU), travelling at 13.57 km/second, to the Earth-Moon system on the 30th August, 2011 @ 01:02 UT ±06:52.