  CCD photometry of the classical nova RW UMi during 10 nights in 1995 through
an R filter and 14 nights in 1997 through a `clear' filter, with the 1-m Wise
telescope yields a periodic modulation in the light curve with the period
0.05912+/-0.00015 d and a semi amplitude of 0.025 mag. We discuss several
explanations for the periodicity, and suggest that it is likely to be the
orbital period of the binary system or a superhump period. RW UMi is thus a
candidate for the classical nova with the shortest known orbital period.
