  We present results from photometric monitoring of V900 Mon, one of the newly
discovered and still under-studied object from FU Orionis type. FUor phenomenon
is very rarely observed, but it is essential for stellar evolution. Since we
only know about twenty stars of this type, the study of each new object is very
important for our knowledge. Our data was obtained in the optical spectral
region with BVRI Johnson-Cousins set of filters during the period from
September 2011 to April 2021. In order to follow the photometric history of the
object, we measured its stellar magnitudes on the available plates from the
Mikulski Archive for Space Telescopes. The collected archival data suggests
that the rise in brightness of V900 Mon began after January 1989 and the
outburst goes so far. In November 2009, when the outburst was registered, the
star had already reached a level of brightness close to the current one. Our
observations indicate that during the period 2011-2017 the stellar magnitude
increased gradually in each pass band. The observed amplitude of the outburst
is about 4 magnitudes (R). During the last three years, the increase in
brightness has stopped and there has even been a slight decline. The comparison
of the light curves of the known FUor objects shows that they are very diverse
and are rarely repeated. However, the photometric data we have so far shows
that the V900 Mon's light curve is somewhat similar to this of V1515 Cyg and
V733 Cep.
