Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010dps....42.3934a&link_type=abstract
American Astronomical Society, DPS meeting #42, #39.34
Astronomy and Astrophysics
Astronomy
Scientific paper
The asteroidal system 2001SN263 is composed by three asteroids of about 3.0 km, 1.0 km and 0.5 km (2008; Nolan et al.). An interesting characteristic of this system is that it crosses the orbit of Mars and approaches the orbit of the Earth. In 2009 we presented a study about the dynamics of such system (2009, Araujo et al.), where we discussed the effects in the asteroids’ orbits due to their mutual gravitational interaction and due to the gravitational perturbation from the planets Earth, Mars and Jupiter (close-approach effects and resonances with the planets). In such study the central asteroid was considered spherical (J2=0.0), but according to Becker et al. (2009) there is an uncertainty about the shape of this body, which allows a configuration of maximum value of J2=0.08. In the present work we made a similar study of the dynamics of the asteroids presented in 2009, but now taking into account the oblateness of the central body, considering values for J2 in the interval 0.0<=J2<=0.08. We also present a study in which we found regions of stability and instability inside such system. For that, we have performed numerical integrations considering seven massive bodies (Sun, Earth, Mars, Jupiter and the three asteroids) and thousands of particles randomly distributed in the neighborhood of the three asteroids, in two cases: i) considering the central-body spherical (J2=0.0) and ii) considering the oblateness of the central body with the maximum value of J2=0.08. We analyzed the orbital evolution of such particles in the system, monitoring cases where collisions or escapes happen, and what are the particles that survive in a given time span. These different possible behaviors are considered to determinate the regions of stability and instability. The determination of such regions is extremely relevant when planning spacecraft missions to visit this system.
Araujo Rosana
Cabo Winter Othon
Prado Antonio F. Bertachini A.
Sukhanov Aleksander
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