HM Leo will be observed by HST/COS tomorrow (2013 February 22). The next target is V406 Vir (SDSS J123813.73-033932.9), to be observed March 1. Details are in AAVSO Special Notice #338 [1]. Your observations are crucial!
Many thanks and good observing - Elizabeth Waagen, AAVSO HQ
Links:
[1] http://www.aavso.org/aavso-special-notice-338
[2] http://www.aavso.org/forums/variable-star-observing/campaigns-observation-reports