Study of the dynamics and space weathering of NEAs

• Grant number: 19/12829-6
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2019
• End date: December 31, 2020
• Field of knowledge: Physical Sciences and Mathematics - Astronomy - Solar System Astronomy
• Principal Investigator: Othon Cabo Winter
• Grantee: Millena Castro Guimarães
• Host Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil
• Associated research grant: 16/24561-0 - On the relevance of small bodies in orbital dynamics, AP.TEM

Abstract

In the current activity plan the main goal is to compute the solar radiation accumulated on the asteroids surface from the moment they became NEA until the current moment, in order to infer the space weathering associated to each one of them. This problem will be approached through N-body numerical integrations, where it will be taken into account the gravitational field of the Sun and the planets on the asteroids, considered as points of mass. The integrations will start from initial conditions with their current positions and velocities towards the past in time, until the moment that the asteroids leave the region of the terrestrial planets. The results of these integrations will be analyzed after being converted in terms of accumulated radiation along their life as a NEA.