Numerical investigation of an Earthgrazing Fireball's Close Approach
Abstract
On October 13th 1990 an earthgrazing fireball crossed the Earth's atmosphere. As we know, grazing meteors type are meteoroid debris that enters the planetary atmosphere with a nearhorizontal orbit, perigee very high to the ground, having only part of their material being ablated during air interaction. Thereso, the remaining could return to space at a different orbit after that short encounter. The grazing fireball EN131090 had an absolute magnitude of 6 and lasted 10 secs, with an 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. The modified orbit of the remaining material, which went out into interplanetary space with solidified fusion crust on its surface, was calculated using the particular method for long trajectory determination of the authors Borovicka and Ceplecha (1992). Using the 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 equations of motion of perturbed twobody problem under a 4th order Symplectic Integrator. In this paper, we continue our investigations about the close encounter of the fireball EN131090 using the regularized elliptic restricted threebody problem and a 4th order symplectic integrator with 9 stages.
 Publication:

7th International Conference in Astronomy
 Pub Date:
 July 2023
 Bibcode:
 2023aasp.confE...4D
 Keywords:

 elliptic restricted threebody problem;
 grazing fireball;
 meteors;
 EN131090;
 modified orbit;
 Symplectic integrator;
 REBOUND