* Astronomy

Orbital elements:
2011 SR25                                                Earth MOID = 0.1738 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 355.96251              (2000.0)            P               Q
n   0.18215998     Peri.  163.64187     +0.98102038     +0.18907287
a   3.0820102      Node   185.97948     -0.18861388     +0.98194388
e   0.6223584      Incl.   24.38975     +0.04498691     -0.00613725
P   5.41           H   21.2           G   0.15           U   8

MPEC 2011 - S47

The 150 - 340 metre wide asteroid 2011 SR25 will make a close pass (75.8 lunar distances, 0.1947 AU), travelling at 15.54 km/second, to the Earth-Moon system on the 27th September, 2011 @ 20:45 UT ±05:05.

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