Laboratory gas-phase photoasbsorption cross sections of the CO Cameron 0--0 band and the underlying pseudo-continuum have been measured at a temperature of 147 K and pressures ~200 mbar, conditions similar to ambient in various planetary and satellite stratospheres in the solar system. A theoretical modeling program has also been used to calculate the band's spectrum. Agreement between the theoretical and the experimental spectra is very good. Models suggest that the observations of the CO Cameron band using the Hubble Space Telescope will be straightforward for Mars, but marginal for Titan. ¿American Geophysical Union 1993