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We present infrared photometry of SN 1999em, plus optical photometry,infrared photometry, and optical spectroscopy of SN 2003hn. Both objects wereType II-P supernovae. The V-[RIJHK] color curves of these supernovae evolved ina very similar fashion until the end of plateau phase. This allows us todetermine how much more extinction the light of SN 2003hn suffered compared toSN 1999em. Since we have an estimate of the total extinction suffered by SN1999em from model fits of ground-based and space-based spectra as well asphotometry of SN 1999em, we can estimate the total extinction and absolutemagnitudes of SN 2003hn with reasonable accuracy. Since the host galaxy of SN2003hn also produced the Type Ia SN 2001el, we can directly compare theabsolute magnitudes of these two SNe of different types.

Do the photometric colors of Type II-P Supernovae allow accurate determination of host galaxy extinction?