Ephemeris
Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2013 08 23 20 57.43 +25 57.7 0.0551 1.053 138.8 39.2 16.9 2013 08 24 20 18.36 +20 57.8 0.0390 1.040 137.5 41.0 16.2 2013 08 25 19 01.43 +08 27.7 0.0258 1.027 128.1 50.8 15.5 2013 08 26 16 37.88 -17 19.0 0.0214 1.014 97.6 81.2 16.0 2013 08 27 14 12.29 -33 19.1 0.0301 1.000 69.8 108.6 18.0 2013 08 28 12 53.40 -36 34.8 0.0448 0.987 57.9 119.9 19.6 2013 08 29 12 13.43 -36 56.0 0.0614 0.974 52.4 124.8 20.6 2013 08 30 11 50.61 -36 44.6 0.0786 0.960 49.3 127.2 21.3 2013 08 31 11 36.11 -36 27.6 0.0962 0.947 47.3 128.4 21.9
The 130 - 300 metre wide asteroid 2013 QR1 will make a close pass (8.2 lunar distances, 0.0211 AU), travelling at 31.25 km/second, to the Earth-Moon system on the 25th August, 2013 @ 19:31 UT ± 00:01.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).