Orbital Evolution of Near-Earth Objects Under Conditions of Intersections of Resonances of Different Types

Special features of orbital evolution of near-earth objects under conditions of superposition of the 1:2 orbital resonance with rotation velocity of the Earth and secular apsidal-nodal resonances associated with the Moon and the Sun are considered. The special features are considered on the example of dynamics of objects moving in the medium Earth orbit (M??) zone in the range of semimajor axes from 26550 to 26570 km and in the range of orbit inclinations from 50 to 70 degrees. It is demonstrated that joint action of stable orbital and secular resonances does not lead to chaoticity in object motion; at the same time, the chaoticity arises in all cases when one of the jointly acting resonances, orbital or secular, is unstable.