2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/110692Archival observations of the progenitor of V838 Mon were re-calibrated as well as multiple images from the 2MASS and the DENIS near infrared surveys. Both - the better calibrated values as well as the variability found in the photographic material has strong effects for the fitting of the spectral energy distribution of the progenitor.4 pages, 3 Postscript figures, in press - Revision after minor changes and a misprint in the tableAstrophysicstext