The outburst of the symbiotic star BX Monocerotis in 2019

New outburst of the object BX Mon occurred in the beginning of 2019. The uniqueness of this event lies in its coincidence with the periastron passage by the hot component. This happened for the first time in the history of observations of this object. Previous epochs the moment of periastron passage corresponded to the lower part of the ascending branch of the light curve. Photometric and spectroscopic observations of BX Mon were carried out in the Fesenkov Astrophysical Institute (Republic of Kazakhstan). BVRc magnitudes, absolute fluxes and the profiles of emission lines were obtained. The maximal values B = 9.^m7 and V = 9.^m3, obtained in the beginning of 2019, are close to those observed during the previous outburst (2003, February). A high level of brightness was maintained until the middle of April. The absolute fluxes in the emission lines Hβ and Hα, obtained during the current outburst, turned out to be significantly weaker compared to the results, obtained in the previous periastron passages. A possible reason of the anomalous decrease of the emission line fluxes is the destruction of the accretion disk - the source of ionizing radiation.