* Astronomy

Orbital elements:
2009 ST104                                               Earth MOID = 0.0420 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 305.07035              (2000.0)            P               Q
n   0.35893896     Peri.  253.81996     +0.29109691     -0.95669165
a   1.9609009      Node   179.24832     +0.92405619     +0.28064702
e   0.5718769      Incl.    8.39762     +0.24775541     +0.07731969
P   2.75           H   25.3           G   0.15           U   8

MPEC 2009 - S120

The 23 - 52 metre wide asteroid 2009 ST104 will make a close pass (16.6 Lunar Distances, 0.0426 AU), travelling at 13.65 km/s, to the Earth-Moon system on the 7th 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).