Another close encounter of a rocky kind....: 2005 YU55
Four hours after closest approach, I made the image above, using a "remote" 61-cm F/10 Cassegrain telescope at Sierra Stars Observatory (MPC G68). It is a 30 second exposure starting at 03:21:41 UT (9 Nov 2011), during which the asteroid (moving from right to left) has trailed considerably.
Astrometry from my images has been included in MPEC 2011-V34 (the G68 observations at
09.11922, 09.14006 and 09.32778).