TELAAH EVOLUSI ORBIT INNER EARTH OBJECTS

• Main Author: Fauzi, Ahmad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74351
• Institution: Institut Teknologi Bandung

Discovery of Inner-Earth Objects (IEOs) or Apoheles a decade ago has dee- pened knowledge about its origin and evolution. Its dynamical evolution is believed to be closely related to Near-Earth Asteroids (especially Atens) and Mars-crossing Asteroids. Population of IEOs has not been known well because of observational bias. As of August 1, 2009 ten asteroids have been discovered belong to IEOs. This work is to study dynamical evolution of IEOs for 10 to 100 thousand years. Since near-Earth space is gravitationally perturbed by terrestrial plane- ts, we selected Atens whose orbits are highly perturbed within 1 and 3 sphere of in?uences of the planets. In accordance to this, we generated 100 orbital clones for each of known IEOs. We then performed orbital integrations using the software package SWIFT. Generally, asteroids located close to orbital resonances and planetary per- turbation show appropriately large changes in their orbital elements. We ?nd that some clones (?10%) evolve into Atens, and so on opposing case. Some of them are even evolve into Apollos or ejected out from Solar System. Inte- restingly, at least four asteroids of the selected-Atens are found to be in state of Kozai resonance (e.g. showing that values of eccentricity and inclination oscillate in an opposite way) during the integration.