  The results of the photometric observations of comet 29P/Schwassmann-Wachmann
1 are analyzed. The comet demonstrates substantial activity at heliocentric
distances larger than 5 AU, outside the water ice sublimation zone. The CCD
images of the comet were obtained in wideband R filters at the 6m telescope of
the Special Astrophysical Observatory of the Russian Academy of Sciences (SAO
RAS) and at the 2m telescope of the Peak Terskol Observatory. The processing of
the images with special digital filters allowed the active structures (jets) to
be distinguished in the dust coma of the comet. With the cross correlation
method, the rotation period of the cometary nucleus was determined as 12.1 and
11.7 days for the observations taken in December 2008, and February 2009,
respectively. The probable causes of the difference in the estimates of the
rotation period of the cometary nucleus obtained by differen authors are
discussed.
