* Astronomy

Orbital elements:
2009 RX4                                                 Earth MOID = 0.0707 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 289.50841              (2000.0)            P               Q
n   0.65201205     Peri.   20.97765     +0.98098312     -0.18862127
a   1.3171411      Node   349.57444     +0.12150536     +0.78065583
e   0.1896122      Incl.   14.64836     +0.15135577     +0.59581750
P   1.51           H   26.2           G   0.15           U   7

MPEC 2009 - S02

The 15 - 35 metre wide asteroid 2009 RX4 made a close pass (27.8 Lunar Distances, 0.0715 AU), travelling at 7.97 km/s, to the Earth-Moon system on the 14th September, 2009.

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