Astronomy and Astrophysics – Astronomy
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995icar..115..209m&link_type=abstract
Icarus (ISSN 0019-1035), vol. 115, no. 1, p. 209-212
Astronomy and Astrophysics
Astronomy
22
Asteroids, Orbital Mechanics, Orbital Resonances (Celestial Mechanics), Stability, Chaos, Hyperbolic Trajectories, Jupiter (Planet), Numerical Integration, Orbit Decay
Scientific paper
Asteroid 2953 Vysheslavia, a Koronis family member about 15 km in diameter, very close to the outer edge of the 5/2 Kirkwood gap, has been shown by numerical integrations to fall into the resonance; then it approaches Jupiter and ends up into a hyperbolic orbit. The typical dynamical lifetime is of the order of 10 Myr. This 'marginally unstable' region of the orbital element space bordering the 5/2 resonance is only approximately equal to 10-3 astronomical units (AU) wide in semimajor axis. Thus Vysheslavia has stayed in its current 'dangerous' location in orbital element space for a time much shorter than the age of the Solar System. We discuss several hypotheses on the origin of this object, including a comparatively recent collision in the Koronis family and the possible implantation into a quasi-stable main-belt orbit of a stray body on a comet-type orbit. We conclude that physical observations are needed to discriminate among these possibilities.
Farinella Paolo
Milani Andrea
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