  Cataclysmic variable SDSS J143317.78+101123.3 with P=0.054241 d (78.1-min)
was suspected to be a possible dwarf nova of WZ Sge type with the sub-stellar
donor, but without detected outbursts so far. Checking the newly available data
from ATLAS survey has revealed the outburst by at least 6 magnitudes in
September 2020, thus confirming the dwarf nova nature of this object with the
brown dwarf secondary. Other projects and individual observers have stopped
their monitoring of this target several days before the outburst. This finding
strengthens the value of observing the twilight zone by the professional
surveys and amateurs.
