An earthgrazing fireball case: simulating close encounters using Rebound Python package and a 4th order Sympletic Integrator
Abstract
Grazing meteors type are meteoroid debris that enter the planetary atmosphere with a nearhorizontal path and perigee very high to the ground, having only part of their material being ablated during air interaction so the remaining could return to space at a different orbit after that brief encounter. So, on 1990 October 13th an earth grazing fireball crossed the atmosphere, with absolute mag of 6 and lasting 10 secs, with initial velocity of 41.7 km/sec, it was observed above Czechoslovakia and Poland and registered by two Czech stations of the European Fireball Network. During its encounter with Earth, the bolide traveled about 409 km during its luminous trajectory. The modified orbit of the remaining material, which went out into interplanetary space with solidified fusion crust on its surface, was calculated using the special method for long trajectory determination of the authors Borovicka and Ceplecha (1992). Using Rebound Python package we implemented calculations for that grazing type close encounters back and forth in time, before initial conditions (IC) used for the retrograde integration and the after IC for prograde integration, then, the same steps were done running the equation of motions under a 4th order Sympletic Integrator. Both results were compared in order to try answer a question if we can obtain a capture (or a collision) in time (back or forth) simulating the solar system.
 Publication:

Theory, Observations and Data Processing in Astronomy, Astrophysics, Space and Planetary Sciences
 Pub Date:
 July 2022
 Bibcode:
 2022todp.confE..21D