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Discovery of Inner-Earth Objects (IEOs) or Apoheles a decade ago has depened 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...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/9841 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Discovery of Inner-Earth Objects (IEOs) or Apoheles a decade ago has depened 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.<p>This work is to study dynamical evolution of IEOs for 10 to 100 thousand years. Since near-Earth space is gravitationally perturbed by terrestrial planets, we selected Atens whose orbits are highly perturbed within 1 and 3 sphere of influences 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.<p>Generally, asteroids located close to orbital resonances and planetary perturbation show appropriately large changes in their orbital elements. We find 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. Interestingly, 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. <br />
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