Orbital patterns of interplanetary objects at close encounters with Jupiter

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Comets, Gravitational Effects, Interplanetary Space, Jupiter (Planet), Orbital Mechanics, Planetary Gravitation, Aphelions, Asteroids, Eccentric Orbits, Meteoroids, Orbital Elements, Perihelions

Scientific paper

The orbital evolutions of 180 objects experiencing low-velocity encounters with Jupiter, and whose orbits are of small to moderate eccentricity, low inclination, nearly tangent to that of the planet, and characterized by a high value of the Tisserand invariant, are examined. One group of these objects consists of a chain of 80 fictitious comets supposed to move along the orbit of P/Oterma before its approach toward Jupiter in 1934, while the other is a semirandom sample of 100 test objects. Distinct families of similiar patterns of widely different occurrence rate are identified among the trajectories. The interaction mostly involves a substantial reduction of the minimum approach distance, while a few nearly circular orbits are transformed into horseshoe-shaped jovicentric trajectories. Coupling between the Tisserand invariant and the heliocentric energy precludes hyperbolic ejections after low-velocity encounters. The occurrence of other special events is discussed, and the results are compared with those for real objects.

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