iTelescope T5 instrument on 12 September 2012. This is a stack of 7 x 60 second images.
They were stacked in ImageJ and a Max intensity Z project made, then despeckeled. The images have variations in brightness which may indicate it is rotating (see my previous image for a better plot). Click to embiggen.
375 metre diameter Near Earth Object 2012 QG42 continues to brighten as it heads for closest approach. It will be 7.4 Earth-Moon distances from us at closest approach on September 14 at 05:08 UT.
For my previous images and animation see here and here.
Here's my video made from my image sequence.