Kovalenko N. Dynamical and physical evolution of comet 95Р/Chiron (2060) and selected Centaurs

The thesis is devoted to investigation of orbital evolution of comet 95Р/Chiron and other Centaurs' group objects by the numerical integrations of systems of differential equations of motion. For Chiron the lightcurve was built (by observations from International Comet Quarterly), and also physical peculiarities of this first known active Centaurs are considered. Dynamical evolution of 33 Centaurs, comets 95/Р Chiron (2060), 39P/Oterma and 29P/Shwassmann-Wachmann 1 was modeled by numerical integration of orbits. The integrations were produced for 1Myr back and forth in time starting at epoch and using the implicit single sequence Everhart methods. The character of changes of orbital elements and peculiarities of close approaches to giant planets are discussed. It is shown that Centaurs orbital evolution is very chaotic, and is characterized by frequent close approaches to giant planets. In some cases such processes occur among Centaurs when the modeled Centaurs are transferred from one planet gravitational influence to another. Some Centaurs are in different resonances, while others avoid them. Cases of ejection from the Solar system, as well as transitions into orbits with smaller perihelion q are not rare. Numerical integration of Chiron orbital evolution shows that the object can be considered as a typical representative of Centaurs group.