The paper considers the process when a self-organized system is reaching its evolutionary maturity. The results obtained can be applied to explain orbital characteristics for five planets of the solar system. The system does not possess specifics of natural objects and is regarded as part of a structure that has borders. In its turn, the structure is understood as a network consisting of nodes (the allowed states) and connections between them. The system is formed as a deployment of a proto-structure, being a two-component cyclically organized system of relations, which is interpreted as the primary structure intended for a step-by-step study of evolution. Evolution is understood as a history-based stage-by-stage deployment. The proto-structure defines the range of the allowed states for n, the order parameter of the system, which subordinates two relative characteristics. As a result of the interaction, the elements of the specified spectrum are split into components and specialize. In this work, the initial data are derived from the analysis of the previous stage of evolution, where the splitting of ten n-nodes within one isolated cycle of the proto-structure is considered. Here we examine five n-nodes; in details, they are presented using approximately fifty interacting positions. These positions are located on three hierarchy levels: the level of positions n, as well as their splittings — the level of shifts n relative to the initial positions — the level of splitting shifts. The inter-level relations and the level of shifts are considered in detail, the basis of which is the invariants formed at the previous stage of evolution.
For application purposes, in the context of circular motion, each element of the spectrum n is interpreted as a relative angular momentum in the solar system. Otherwise, the element of the spectrum is split into components, and each of them is responsible for the subordinate distance or for the period of revolution. The evolutionary maturity of planetary distances and orbital periods for Mercury, Venus, Earth, Mars and Pluto is discussed. The stability criterion for the final positions n is considered. On average, model positions of perihelia, aphelia, major and minor semi-axes correspond to observational data within 8*10-4 %. For the first time from a structural point of view, it is shown why the orbits of the planets differ so little from circular ones. Model periods of planetary revolution do not differ on average from those observed within 1,3*10-2 %.
Key words: evolution, structure, evolutionary maturity, order parameter, planetary orbits, planet periods.