Asteroid (285944) 2001 RZ11, in the constellation Piscis Austrinus, is at its closest approach to the Earth at 03:20 UT, 17th August 2014. The asteroid may reach magnitude +12.0 in the constellation Capricornus at 17:50 UT, 17th August 2014.
The 1400 - 3100 metre wide asteroid 2001 RZ11 will make a close pass (34.2 lunar distances, 0.0879 AU), travelling at 29.33 km/second, to the Earth-Moon system on the 17th August 2014 @ 03:16 UT ±00:01.