The Stability of the Terrestrial Planets in Systems with a Planet in the Asteroid Belt

Details The Stability of the Terrestrial Planets in Systems with a Planet in the Asteroid Belt The Stability of the Terrestrial Planets in Systems with a Planet in the Asteroid Belt

May 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000dda....31.0404q&link_type=abstract

American Astronomical Society, DDA Meeting #31, #04.04; Bulletin of the American Astronomical Society, Vol. 32, p.859

Astronomy and Astrophysics

Astronomy

Scientific paper

If a massive planetary-sized body was present in the asteroid belt, the orbits of the terrestrial planets and those of the giant planets would be more closely coupled. A greater exchange in angular momentum could affect the stability of the terrestrial planets. To study this effect, we have simulated several systems consisting of the solar system planets and a planetary-sized (0.1-10 Earth masses) asteroid in the asteroid belt. An integration with Ceres at five Earth-masses remained stable for a billion years. Runs with Ceres at ten Earth masses, however, caused the system to become unstable at 25-50 million years. When additional mass was given to both Ceres (bringing it up to five Earth masses) and Mars (one Earth mass), the systems remained stable for a comparable amount of time. A system with Pallas at five Earth masses became unstable at 170 million years. Vesta at five Earth masses, however, caused the system to become unstable in less than 100 million years. This research was supported in part by NASA's OSSRP under grant NAG 5-4640.

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