Dynamical Investigation of Trans-Neptunian Objects in particular the Mean-Motion Resonances with Neptune

There are a large number of small bodies (known as trans-Neptunian objects or TNOs) in the outer solar system that show different types of dynamical behavior. These objects can be considered as "probes" of the dynamical and chemical history of the Solar System. These asteroids or planetezimals are relics of dynamical events among and beyond the giant planets, and the current observed orbital distribution of the TNOs is a sign of large-scale changes in the position of the giant planets. The dynamical classification of the bodies of this outer region of the Solar System helps to understand the structure and formation of the Solar System. In this work, we performed a comprehensive survey on the TNOs. By using the FAIR method considering all known small bodies in outer Solar System (more than 4,000 asteroids classified as TNO in the JPL database), we identified several MMRs between these bodies and the planet Neptune. According to our dynamical investigations, there are two types of resonant behaviour of asteroids; namely, when the critical argument (resonance variable) shows short-term or long-term libration.