* Astronomy

Orbital elements:
2011 RJ1                                            PHA, Earth MOID = 0.0433 AU
Epoch 2011 Aug. 27.0 TT = JDT 2455800.5                 MPC
M 355.76785              (2000.0)            P               Q
n   0.24344966     Peri.  345.53312     +0.99215008     +0.12412662
a   2.5401728      Node     7.38692     -0.09974903     +0.85880163
e   0.5900613      Incl.    6.78613     -0.07542116     +0.49704360
P   4.05           H   21.8           G   0.15           U   7

MPEC 2011 - R32

The 120 - 270 metre wide asteroid 2011 RJ1 made a close pass (25.6 lunar distances, 0.0657 AU), travelling at 8.30 km/second, to the Earth-Moon system on the 8th September, 2011 @ 07:52 UT ±00:31.

See more

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