* Astronomy

Orbital elements:
2011 UJ21                                                Earth MOID = 0.0303 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 215.14480              (2000.0)            P               Q
n   1.02805526     Peri.  117.69565     -0.79578898     -0.55827460
a   0.9722809      Node    30.21135     +0.24224350     -0.64856421
e   0.2751201      Incl.   27.79284     +0.55501169     -0.51739147
P   0.96           H   23.4           G   0.15           U   8

MPEC 2011 - U40


The 55 - 120 metre wide asteroid 2011 UJ21 will make a close pass (15.5 lunar distances, 0.0399 AU), travelling at 16.21 km/second, to the Earth-Moon system on the 25th October, 2011 @ 08:37 UT ±00:01.

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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).