  We present B, V, R, I and Z-band photometric observations of HD 209458 during
the transit by its planetary companion on UT 1999 November 15 with the
University of Hawaii 0.6m and 2.2m telescopes and the High Altitude Observatory
STARE telescope. The detailed shape of the transit curve is predicted to vary
with color due primarily to the color-dependent limb-darkening of the star, but
potentially due as well to the effect of color-dependent opacity in the
planetary atmosphere. We model the light curves and present refined values for
the transit timing and orbital period, useful for planning future observations
of the planetary transit. We also derive significantly improved measurements of
the planetary radius, R_p = 1.55 +/- 0.10 R_Jup, stellar radius, R_s = 1.27 +/-
0.05 R_Sun, and orbital inclination, i = 85.9 +/- 0.5 deg. The derived
planetary radius favors evolutionary models in which the planet has a low
albedo.
