The 41 - 92 metre wide asteroid 2014 GR1 will make a close pass (25.2 lunar distances, 0.0648 AU), travelling at 8.07 km/second, to the Earth-Moon system on the 12th April, 2014 @ 01:32 UT ±00:06.
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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 V 2014 04 10 16 13.96 +38 43.9 0.0654 1.033 117.4 59.4 20.3 2014 04 11 16 32.28 +40 49.2 0.0649 1.030 113.6 63.1 20.4 2014 04 12 16 51.87 +42 43.5 0.0647 1.026 109.8 66.8 20.5 2014 04 13 17 12.57 +44 24.1 0.0648 1.022 106.0 70.5 20.6 2014 04 14 17 34.13 +45 48.9 0.0653 1.019 102.3 74.1 20.7 2014 04 15 17 56.22 +46 56.3 0.0660 1.015 98.7 77.6 20.8 2014 04 16 18 18.46 +47 45.8 0.0671 1.012 95.2 81.0 21.0 2014 04 17 18 40.48 +48 17.9 0.0684 1.008 91.8 84.3 21.1 2014 04 18 19 01.89 +48 33.6 0.0700 1.005 88.7 87.3 21.3 2014 04 19 19 22.41 +48 34.6 0.0718 1.001 85.7 90.2 21.5 2014 04 20 19 41.79 +48 23.0 0.0738 0.998 82.9 92.9 21.6 2014 04 21 19 59.92 +48 01.2 0.0761 0.995 80.4 95.3 21.8 2014 04 22 20 16.73 +47 31.0 0.0785 0.992 78.0 97.6 22.0 2014 04 23 20 32.22 +46 54.7 0.0811 0.989 75.8 99.7 22.1 2014 04 24 20 46.44 +46 13.7 0.0838 0.986 73.8 101.5 22.3 2014 04 25 20 59.46 +45 29.6 0.0866 0.983 71.9 103.2 22.4 2014 04 26 21 11.39 +44 43.5 0.0896 0.980 70.3 104.8 22.6 2014 04 27 21 22.32 +43 56.3 0.0927 0.977 68.8 106.2 22.7 2014 04 28 21 32.35 +43 08.8 0.0959 0.974 67.4 107.4 22.9 2014 04 29 21 41.57 +42 21.4 0.0992 0.971 66.2 108.5 23.0 2014 04 30 21 50.06 +41 34.6 0.103 0.969 65.1 109.4 23.1