Ephemeris
Date TT R. A. (2000) Decl. Delta r Elong. Phase Mag 2014 01 03 05 24 14.5 +25 44 07 0.05061 1.0309 159.5 19.5 18.8 2014 01 04 05 32 10.6 +25 26 16 0.05052 1.0310 160.3 18.8 18.7 2014 01 05 05 40 09.8 +25 06 44 0.05050 1.0312 161.1 18.0 18.7 2014 01 06 05 48 10.4 +24 45 32 0.05056 1.0315 161.9 17.2 18.7 2014 01 07 05 56 10.5 +24 22 47 0.05070 1.0319 162.7 16.5 18.7 2014 01 08 06 04 08.5 +23 58 35 0.05092 1.0323 163.5 15.7 18.7 2014 01 09 06 12 02.5 +23 33 04 0.05122 1.0328 164.3 14.9 18.6 2014 01 10 06 19 50.9 +23 06 24 0.05159 1.0333 165.1 14.2 18.6 2014 01 11 06 27 32.3 +22 38 44 0.05205 1.0340 165.9 13.4 18.6 2014 01 12 06 35 05.1 +22 10 14 0.05258 1.0347 166.6 12.7 18.6 2014 01 13 06 42 28.1 +21 41 07 0.05320 1.0355 167.3 12.1 18.6 2014 01 14 06 49 40.3 +21 11 32 0.05389 1.0363 167.9 11.5 18.6 2014 01 15 06 56 40.8 +20 41 41 0.05465 1.0372 168.5 10.9 18.6 2014 01 16 07 03 28.8 +20 11 43 0.05549 1.0382 169.0 10.4 18.7 2014 01 17 07 10 03.7 +19 41 50 0.05641 1.0393 169.5 9.9 18.7 2014 01 18 07 16 25.2 +19 12 09 0.05740 1.0404 170.0 9.5 18.7 2014 01 19 07 22 33.0 +18 42 49 0.05846 1.0416 170.3 9.1 18.7 2014 01 20 07 28 26.8 +18 13 59 0.05959 1.0428 170.6 8.8 18.8
The 230 - 520 metre wide asteroid 2013 XZ21 will make a close pass (73.4 lunar distances, 0.1886 AU), travelling at 19.01 km/second, to the Earth-Moon system on the 4th January 2014 @ 12:13 UT ±00:01.
See moreThe Lunar Distance (LD), the distance between Earth and the Moon, equals 384,401 km, (or 0.00256 AU).