We observed the 1998 November superoutburst of WX Cet , a dwarf nova originally proposed as a WZ Sge-like system .
The observation established that WX Cet is an SU UMa-type dwarf nova with a mean superhump period of 0.05949 ( 1 ) d , which is 2.1 % longer than the reported orbital period .
The lack of early superhumps at the earliest stage of the superoutburst , the rapid development of usual superhumps , and the possible rapid decay of late superhumps seem to support that WX Cet is a fairly normal large-amplitude SU UMa-type dwarf nova , rather than a WZ Sge-type dwarf nova with a number of peculiarities .
However , a period increase of superhumps at a rate \dot { P } / P = +8.5 \pm 1.0 \times 10 ^ { -5 } was observed , which is one of the largest \dot { P } / P ever observed in SU UMa-type dwarf novae .
A linear decline of light , with a rate of 0.10 mag d ^ { -1 } , was observed in the post-superoutburst stage .
This may be an exemplification of the decay of the viscosity in the accretion disk after the termination of a superoutburst , mechanism of which is proposed to explain a variety of post-superoutburst phenomena in some SU UMa-type dwarf novae .