  Here is presented recalculated value of the mass of Ceres, based on explicit
tracking of its gravitational influence on orbits evolution of 21 selected
asteroids during their mutual close encounters (CE). It was applied a new
modified method (MM) for mass determination, based on the connecting of
pre-encounter observations to the orbit determined from post-encounter ones.
The calculated weighted mean value of Ceres mass, based on modified method, is
$(4.54\pm0.07)\,10^{-10}M_{\odot}$ while standard procedure (SM) provided
result of $(4.70\pm0.04)\,10^{-10}M_{\odot}$. We found that correlation between
individual estimated masses based on modified and standard method is 0.78,
which confirms reliability of using modified method.
