* Astronomy

The 17 - 38 metre wide asteroid 2011 UT will make a close pass (22.0 lunar distances, 0.0566 AU), travelling at 8.67 km/second, to the Earth-Moon system on the 21st September 2014 @ 07:33 UT ±2 days 03:55. 

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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 09 20    10 25 05.5 -05 39 19   0.05767 0.9512    21.9   156.8    29.7
2014 09 21    10 08 02.0 -03 05 00   0.05766 0.9528    26.2   152.3    28.6
2014 09 22    09 51 16.2 -00 30 38   0.05810 0.9546    31.0   147.2    27.6
2014 09 23    09 34 59.5 +02 00 28   0.05898 0.9565    36.0   141.9    26.9
2014 09 24    09 19 21.1 +04 25 29   0.06027 0.9587    41.0   136.6    26.2
2014 09 25    09 04 28.1 +06 42 18   0.06193 0.9610    45.9   131.5    25.7
2014 09 26    08 50 24.9 +08 49 31   0.06394 0.9635    50.6   126.5    25.3
2014 09 27    08 37 13.8 +10 46 27   0.06625 0.9661    55.1   121.7    25.0
2014 09 28    08 24 55.3 +12 32 58   0.06883 0.9689    59.3   117.2    24.8
2014 09 29    08 13 28.3 +14 09 24   0.07163 0.9718    63.3   112.9    24.6
2014 09 30    08 02 50.8 +15 36 19   0.07464 0.9750    67.1   108.9    24.4