* Astronomy

Orbital elements:
2009 SD1                                                 Earth MOID = 0.0241 AU
Epoch 2009 June 18.0 TT = JDT 2455000.5                 MPC
M 295.77323              (2000.0)            P               Q
n   0.45326141     Peri.   62.47518     +0.44852838     -0.89371905
a   1.6784312      Node     1.02713     +0.51480519     +0.24972824
e   0.4941250      Incl.   31.66616     +0.73061475     +0.37269568
P   2.17           H   22.1           G   0.15           U   9

MPEC 2009 - S37

The 100 - 220 metre wide asteroid 2009 SD1 will make a close pass (21.1 Lunar Distances, 0.0542 AU), travelling at 21.27 km/s, to the Earth-Moon system on the 22nd 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).