HST/COS will be observing U Gem 2013 January 30 as part of Dr. Michael Shia's study of this dwarf nova. Please see AAVSO Special Notice #328 for details.
Elizabeth Waagen, AAVSO HQ
Here's a plot of some U Gem data I submitted, taken from 31Dec12-29Jan13; 20 Vp's & 18 Bp's.
James Foster, Los Angeles, CA