  We model the spectra and spectral energy distribution of V838 Mon which were
observed in February, March, and November, 2002. Theoretical spectra are
calculated using the classical model atmospheres taking into account absorption
of atomic and molecular lines. By fitting the observed spectra we determine the
physical parameters of the atmosphere of V838 Mon. These parameters are
determined to be Teff = 5330 +/- 300 K, 5540 +/- 270 K, 4960 +/- 190 K, and
2000 +/- 200 K for February 25, March 2, March 26, and November 6,
respectively.
