* Astronomy

Orbital elements:
2009 RD4                                                 Earth MOID = 0.0976 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 331.92069              (2000.0)            P               Q
n   0.23436973     Peri.    9.95605     +0.95022216     -0.30650662
a   2.6053638      Node     8.54279     +0.25363961     +0.65664922
e   0.5800503      Incl.   22.13031     +0.18095523     +0.68910485
P   4.21           H   20.6           G   0.15           U   9

MPEC 2009 - R63

The 210 - 470 metre wide asteroid 2009 RD4 will make a close pass (52.4 Lunar Distances, 0.1347 AU), travelling at 14.09 km/s, to the Earth-Moon system on the 8th October, 2009.

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