Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cemda..58...53m&link_type=abstract
Celestial Mechanics and Dynamical Astronomy, vol. 58, no. 1, p. 53-64
Astronomy and Astrophysics
Astronomy
19
Asteroids, Eccentric Orbits, Mars (Planet), Orbit Calculation, Orbit Perturbation, Orbital Elements, Planetary Orbits, Adiabatic Conditions, Eccentricity, Asteroids, Trojan Asteroids, Eureka, Orbit, Mars, Numerical Methods, Orbital Elements, Motion, Perturbation, Eccentricity, Resonance, Data, Stability, Celestial Mechanics, Timescale, Calculations, Evolution, Inclination, Libration
Scientific paper
Observations and results of orbit determination of the first known Mars Trojan asteroid (5261) Eureka are presented. We have numerically calculated the evolution of the orbital elements, and have analyzed the behavior of the motion during the next 2 Myr. Strong perturbations by planets other than Mars seem to stabilize the eccentricity of the asteroid by stirring the high order resonances present in the elliptic restricted problem. As a result, the orbit appears stable at least on megayear timescales. The difference of the mean longitudes of Mars and Eureka and the semimajor axis of the asteroid form a pair of variables that essentially behave in an adiabatic manner, while the evolution of the other orbital elements is largely determined by the pertubations due to other planets.
Bowell Edward
Innanen Kimmo
Mikkola Seppo
Muinonen Karri
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