The 180 - 410 metre wide asteroid 2013 UB1 will make a close pass (28.2 lunar distances, 0.0725 AU), travelling at 10.38 km/second, to the Earth-Moon system on the 6th January 2014 @ 03:25 UT ±00:01.
See moreThe 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 01 01 19 51 36.5 -10 23 08 0.07944 0.9093 20.4 157.9 25.4 2014 01 02 19 38 01.4 -12 41 02 0.07709 0.9093 15.5 163.2 27.3 2014 01 03 19 23 21.1 -15 04 31 0.07519 0.9095 10.5 168.6 30.6 2014 01 04 19 07 38.3 -17 31 05 0.07379 0.9099 5.7 173.8 2014 01 05 18 50 58.3 -19 57 37 0.07290 0.9106 3.8 175.9 2014 01 06 18 33 30.1 -22 20 40 0.07255 0.9115 7.7 171.7 34.0 2014 01 07 18 15 25.8 -24 36 47 0.07274 0.9126 13.0 166.0 28.7 2014 01 08 17 57 00.3 -26 42 54 0.07347 0.9139 18.4 160.2 26.0 2014 01 09 17 38 30.3 -28 36 41 0.07471 0.9155 23.7 154.4 24.3 2014 01 10 17 20 12.5 -30 16 40 0.07644 0.9172 28.9 148.8 23.2 2014 01 11 17 02 22.7 -31 42 22 0.07861 0.9192 33.9 143.4 22.4 2014 01 12 16 45 14.3 -32 54 09 0.08118 0.9214 38.6 138.2 21.8 2014 01 13 16 28 57.5 -33 52 59 0.08411 0.9238 43.1 133.4 21.3 2014 01 14 16 13 39.1 -34 40 15 0.08735 0.9265 47.2 128.8 20.9 2014 01 15 15 59 22.8 -35 17 29 0.09086 0.9293 51.1 124.5 20.6 2014 01 16 15 46 09.4 -35 46 14 0.09460 0.9323 54.8 120.5 20.4 2014 01 17 15 33 57.9 -36 08 00 0.09853 0.9355 58.2 116.7 20.2 2014 01 18 15 22 45.5 -36 24 03 0.1026 0.9390 61.4 113.1 20.1 2014 01 19 15 12 28.5 -36 35 31 0.1069 0.9426 64.4 109.8 20.0 2014 01 20 15 03 02.7 -36 43 20 0.1112 0.9464 67.2 106.6 19.9