Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...116..201c&link_type=abstract
Astronomy and Astrophysics, vol. 116, no. 2, Dec. 1982, p. 201-209.
Astronomy and Astrophysics
Astrophysics
14
Comets, Jupiter (Planet), Meteor Trails, Meteoroid Showers, Particle Motion, Encounters, Orbit Perturbation, Particle Trajectories
Scientific paper
The motion of particles ejected at different velocities from the nucleus of Comet Lexell at its 1770 perihelion passage - the first approach to the sun after a considerable reduction of the perihelion distance - is followed through the next close encounter with Jupiter in 1779. Perturbed Jovicentric and heliocentric orbits are computed for 45 model objects after a time lapse of 12 yr including the strong perturbation, and the subsequent evolution of the particle stream is discussed. Striking differences as compared with a similar experiment on Comet Oterma (Carusi et al., 1981) are mainly due to a lower value of the Tisserand invariant. A complete dispersion of the part of the stream passing closest to Jupiter, similar to an explosion, is accompanied by a very simple and continuous sequence of Jovicentric trajectories. Implications regarding the stream of meteor particles left in earth-crossing orbits will be discussed in more detail in another paper.
Carusi Andrea
Kresakova M.
Valsecchi Giovanni B.
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