* Astronomy

Orbital elements:
2009 SF                                                  Earth MOID = 0.0897 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 305.94572              (2000.0)            P               Q
n   0.51586230     Peri.   14.82209     +0.98544311     -0.16008643
a   1.5397381      Node   353.51700     +0.04932718     +0.59134619
e   0.2935005      Incl.   30.45013     +0.16269205     +0.79036828
P   1.91           H   25.1           G   0.15           U   9

MPEC 2009 - S08

The 24 - 54 metre wide asteroid 2009 SF made a close pass (35.3 Lunar Distances, 0.0908 AU), travelling at 16.52 km/s, to the Earth-Moon system on the 16th 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).