MASTER OT J030227.28+191754.5 Discovered by the MASTER survey at 15.1 mag (unfiltered) on 2021 Nov 26.826. It was also independently discovered by Yuji Nakamura at 11.7 mag (unfiltered) on Nov 28.469.
Initially thought to have been a Nova, spectroscopic and photometric observations (see Atel 15074) have revealed it to be the largest amplitude UGWZ type system yet discovered.
CCD observations were obtained using SLOOH and the Open University COAST telescope.
December 12.105UT 13.98CV truncated COAST image