  The analysis of the dynamics of radial movement in different reference frames
used in cosmology is made. Use of different frames leads to the difference in
inertial forces resulting in different observable effects. The important effect
is the appearance in the system different from the synchronous one of the
acceleration proportional to the distance analogous to the action of the
cosmological constant. Numerical estimate of the difference of this effective
cosmological constant and the invariant constant in Einstein equations is made.
