  We present the results of modelling the 0.45--1 micron spectral energy
distribution of V838 Mon for 2002 November. Synthetic spectra were calculated
using the NextGen model atmospheres of Hauschildt et al. (1999), which
incorporate line lists for H2O, TiO, CrH, FeH, CO, and MgH, as well as the VALD
atomic line list. Fits to the observed spectra show that, in 2002 November, the
effective temperature of V838 Mon was approximately 2000 +/-100 K. Our
theoretical spectra show a comparatively weak dependence on log g. Preliminary
analysis of the hot star observed together with V838 Mon shows it to be a
normal B3V dwarf.
