Ephemeris
Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2014 05 03 03 23 00.4 -19 20 21 0.06644 0.9554 36.5 141.2 21.0 2014 05 04 03 05 47.7 -19 35 36 0.06617 0.9554 35.8 141.8 21.1 2014 05 05 02 48 28.1 -19 43 15 0.06625 0.9555 35.8 141.8 21.1 2014 05 06 02 31 15.5 -19 43 08 0.06668 0.9559 36.4 141.2 21.0 2014 05 07 02 14 22.8 -19 35 32 0.06746 0.9564 37.6 139.9 20.9 2014 05 08 01 58 01.9 -19 21 02 0.06858 0.9570 39.2 138.2 20.7 2014 05 09 01 42 22.4 -19 00 30 0.07000 0.9579 41.2 136.0 20.5 2014 05 10 01 27 31.5 -18 34 54 0.07173 0.9589 43.5 133.5 20.3 2014 05 11 01 13 33.8 -18 05 19 0.07373 0.9600 45.9 130.9 20.0 2014 05 12 01 00 31.7 -17 32 46 0.07597 0.9614 48.4 128.2 19.9 2014 05 13 00 48 25.5 -16 58 11 0.07843 0.9628 51.0 125.4 19.7 2014 05 14 00 37 14.2 -16 22 21 0.08110 0.9645 53.5 122.6 19.5 2014 05 15 00 26 55.6 -15 45 58 0.08393 0.9663 56.0 119.9 19.4 2014 05 16 00 17 26.6 -15 09 33 0.08692 0.9683 58.4 117.2 19.3 2014 05 17 00 08 43.9 -14 33 32 0.09003 0.9704 60.8 114.6 19.2 2014 05 18 00 00 44.0 -13 58 13 0.09326 0.9726 63.0 112.1 19.1 2014 05 19 23 53 23.1 -13 23 49 0.09658 0.9751 65.2 109.6 19.0 2014 05 20 23 46 37.8 -12 50 29 0.09998 0.9776 67.3 107.2 19.0 2014 05 21 23 40 24.6 -12 18 21 0.1034 0.9804 69.4 105.0 18.9 2014 05 22 23 34 40.5 -11 47 26 0.1070 0.9832 71.3 102.7 18.9 2014 05 23 23 29 22.5 -11 17 46 0.1105 0.9862 73.3 100.6 18.8 2014 05 24 23 24 27.9 -10 49 22 0.1141 0.9894 75.1 98.5 18.8 2014 05 25 23 19 54.3 -10 22 12 0.1177 0.9927 76.9 96.5 18.8 2014 05 26 23 15 39.4 -09 56 15 0.1213 0.9961 78.6 94.5 18.8 2014 05 27 23 11 41.4 -09 31 28 0.1250 0.9997 80.3 92.6 18.8 2014 05 28 23 07 58.4 -09 07 50 0.1286 1.0034 81.9 90.8 18.8 2014 05 29 23 04 28.8 -08 45 18 0.1323 1.0072 83.5 89.0 18.8 2014 05 30 23 01 11.2 -08 23 49 0.1359 1.0112 85.1 87.2 18.8 2014 05 31 22 58 04.2 -08 03 22 0.1395 1.0153 86.6 85.5 18.8
The 270 - 590 metre wide asteroid 2003 MH4 will made a close pass (25.7 lunar distances, 0.0662 AU), travelling at 8.16 km/second, to the Earth-Moon system on the 4th May 2014 @ 06:28 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).