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Abstract
The accurate estimation of the space object remaining lifetime is interesting now because of many practical reasons, one of which is the selection of a disposal orbit with the settled lifetime.The results of such a kind of estimation based on using the precise numerical integration and up-to-date dynamical models of atmosphere was obtained for different classes of near Earth orbits.At carrying out researches the influence of initial orbital elements, including a perigee distance, an eccentricity and an inclination as well as an initial epoch of considered orbit; value of ballistic coefficient; atmospheric model and a behavior of environment data were examined.At the calculations of the atmospheric density for long term prediction the environment data model within the fifty years, constructed by IZMIRAN was used.