The 29 - 65 metre wide asteroid 2003 HT42 will make a close pass (36.6 lunar distances, 0.0942 AU), travelling at 7.54 km/second, to the Earth-Moon system on the 23rd March 2014 @ 06:12 UT ±03:09.
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The Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).
Ephemeris
Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2014 03 22 03 55 46.9 +51 41 05 0.1099 0.9650 70.4 103.4 23.7 2014 03 23 04 11 34.7 +51 45 41 0.1099 0.9680 71.8 102.0 23.7 2014 03 24 04 27 17.2 +51 42 02 0.1100 0.9709 73.2 100.5 23.6 2014 03 25 04 42 46.4 +51 30 22 0.1103 0.9737 74.6 99.1 23.5 2014 03 26 04 57 54.8 +51 11 07 0.1108 0.9764 75.9 97.8 23.5 2014 03 27 05 12 36.2 +50 44 48 0.1115 0.9791 77.2 96.4 23.4 2014 03 28 05 26 45.5 +50 12 04 0.1122 0.9817 78.4 95.1 23.4 2014 03 29 05 40 18.8 +49 33 36 0.1132 0.9842 79.6 93.9 23.4 2014 03 30 05 53 13.8 +48 50 09 0.1143 0.9867 80.8 92.7 23.4 2014 03 31 06 05 29.2 +48 02 27 0.1155 0.9891 81.8 91.5 23.3 2014 04 01 06 17 04.5 +47 11 13 0.1168 0.9914 82.8 90.4 23.3 2014 04 02 06 28 00.3 +46 17 06 0.1183 0.9937 83.8 89.4 23.3 2014 04 03 06 38 17.7 +45 20 45 0.1199 0.9959 84.7 88.4 23.3 2014 04 04 06 47 58.1 +44 22 43 0.1215 0.9980 85.6 87.5 23.3 2014 04 05 06 57 03.5 +43 23 29 0.1233 1.0000 86.3 86.6 23.3 2014 04 06 07 05 35.9 +42 23 32 0.1252 1.0020 87.1 85.8 23.3 2014 04 07 07 13 37.3 +41 23 12 0.1272 1.0039 87.7 85.0 23.3 2014 04 08 07 21 09.8 +40 22 50 0.1293 1.0057 88.3 84.3 23.3 2014 04 09 07 28 15.5 +39 22 42 0.1314 1.0075 88.9 83.6 23.3 2014 04 10 07 34 56.4 +38 23 00 0.1336 1.0092 89.4 83.0 23.4 2014 04 11 07 41 14.3 +37 23 58 0.1359 1.0108 89.8 82.4 23.4 2014 04 12 07 47 11.0 +36 25 42 0.1382 1.0123 90.2 81.9 23.4 2014 04 13 07 52 48.1 +35 28 21 0.1406 1.0138 90.6 81.4 23.4 2014 04 14 07 58 07.2 +34 32 00 0.1431 1.0152 90.9 81.0 23.4 2014 04 15 08 03 09.7 +33 36 42 0.1455 1.0165 91.2 80.6 23.5 2014 04 16 08 07 56.9 +32 42 31 0.1481 1.0177 91.4 80.3 23.5 2014 04 17 08 12 30.0 +31 49 29 0.1506 1.0189 91.5 80.0 23.5 2014 04 18 08 16 50.1 +30 57 36 0.1532 1.0200 91.7 79.7 23.6 2014 04 19 08 20 58.1 +30 06 53 0.1559 1.0211 91.8 79.4 23.6 2014 04 20 08 24 55.1 +29 17 20 0.1585 1.0220 91.9 79.2 23.6 2014 04 21 08 28 41.9 +28 28 56 0.1612 1.0229 91.9 79.0 23.6 2014 04 22 08 32 19.3 +27 41 40 0.1639 1.0237 91.9 78.9 23.7 2014 04 23 08 35 48.0 +26 55 32 0.1667 1.0245 91.9 78.8 23.7 2014 04 24 08 39 08.6 +26 10 29 0.1694 1.0251 91.8 78.7 23.7 2014 04 25 08 42 21.9 +25 26 30 0.1722 1.0257 91.8 78.6 23.8 2014 04 26 08 45 28.3 +24 43 33 0.1749 1.0262 91.7 78.5 23.8 2014 04 27 08 48 28.3 +24 01 38 0.1777 1.0267 91.5 78.5 23.8 2014 04 28 08 51 22.4 +23 20 41 0.1805 1.0271 91.4 78.5 23.9 2014 04 29 08 54 11.0 +22 40 41 0.1832 1.0274 91.2 78.5 23.9 2014 04 30 08 56 54.4 +22 01 36 0.1860 1.0276 91.1 78.5 23.9
