  A modulation in the V-band with period 527.84+/-1.81 sec and amplitude 0.023
magnitude, attributable to the spin of the magnetic white dwarf primary star,
has been detected in 7.5 hours of V-band CCD photometry data recorded during
the January 2004 outburst of the DQ Her type dwarf nova DO (YY) Draconis. This
measurement is consistent with previous results for the white dwarf spin period
based on X-ray and UV observations made with the Hubble Space Telescope, ROSAT
and the Rossi X-ray Timing Explorer and appears to be the first independent
determination of the spin period in the V-band. It is consistent with previous
V-band observations in not showing a significant signal at the first harmonic
of the spin period as seen in X-ray and UV data. Light output in the V-band
peaks only once per rotation of the white dwarf rather than twice as seen in
X-rays and UV. Concurrent observation at optical and X-ray wavelengths is
needed to establish whether these two modulation behaviours occur at the same
time during the outburst and to investigate the phase relationship between
them. A coordinated observing campaign at a future outburst would help to
advance our understanding of this system.
