* Astronomy

Orbital elements:
2011 UK21                                                Earth MOID = 0.0078 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 325.49402              (2000.0)            P               Q
n   0.43773761     Peri.   23.22168     +0.55633286     -0.82775627
a   1.7178826      Node    33.10847     +0.73993071     +0.45355928
e   0.4295811      Incl.    7.66885     +0.37814852     +0.33030824
P   2.25           H   25.1           G   0.15           U   6

MPEC 2011 - U38


The 25 - 56 metre wide asteroid 2011 UK21 will make a close pass (11.1 lunar distances, 0.0285 AU), travelling at 8.26 km/second, to the Earth-Moon system on the 23rd October, 2011 @ 00:54 UT ±00:06.

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