2010 UH55 was discovered by the Spacewatch survey on 2010 Oct. 29; it was soon clear that with its peculiar orbital elements and a Tj=2.61, 2010 UH55 could be in a possible cometary orbit. Earlier observations made remotely by H. Sato with a 0.51-m f/6.8 reflector from RAS Observatory (H06) on 2010, Nov. 17 reveal its possible softness and a hint of a tail on the west side.
He again observed it almost a year later (2011, Nov. 3) confirming its cometary appearance. He then contacted the T3 mailing-list, and I was able to observe it on Nov. 15 with a 0.38-m f/6.8 reflector from our observatory (204). That night had good seeing and transparency, but 83% Moon was 60° away. In a stack of images totalling 25 minutes of unfiltered exp. time (visible below) it has a compact coma 8″ wide and a faint tail 10-15″ long in PA 290°.
That feature was also confirmed by D. Chestnov and A. Novichonok remotely with a 0.40-m telescope at the TAU Station of Ka-Dar Observatory (North Caucasus, Russia) and from Sostero et al. using the 2.0-m Faulkes Telescope North at Haleakala.
Results were published in CBET 2923 (subscription required) and latest astrometry in MPEC 2011-W82, together with revised orbital elements.