FM12p.47 — Fireball data analysis: bridging the gap between small solar system bodies and meteorite studies

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Aug 4th at 6:00 PM until 6:00 PM

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Author(s): Maria Gritsevich3, Manuel Moreno-Ibáñez4, Daria Kuznetsova5, Alexis Bouquet6, Josep Trigo-Rodríguez4, Jouni Peltoniemi1, Detlef Koschny2

Institution(s): 1. Department of Physics, University of Helsinki, 2. European Space Agency, Research and Scientific Support Department, 3. Finnish Geospatial Research Institute, 4. Institute of Space Sciences (CSIC-IEEC), 5. Russian Academy of Sciences, Dorodnicyn Computing Centre, Department of Computational Physics, 6. University of Texas at San Antonio, Department of Physics & Astronomy

One of the important steps in identification of meteorite-producing fireballs and prediction of impact threat to Earth raised by potentially hazardous asteroids is the understanding and modeling of processes accompanying the object’s entry into the terrestrial atmosphere (Gritsevich et al., 2012). Such knowledge enables characterization, simulation and classification of possible impact consequences with further reommendation for potential meteorite searches. Using dimensionless expressions, which involve the pre-atmospheric meteoroid parameters, we have built physically based parametrisation to describe changes in mass, height, velocity and luminosity of the object along its atmospheric path (Gritsevich and Koschny, 2011; Bouquet et al., 2014). The developed model is suitable to estimate a number of crucial unknown values including shape change coefficient, ablation rate, and surviving meteorite mass. It is also applicable to predict the terminal height of the luminous flight and therefore, duration of the fireball (Moreno-Ibáñez et al., 2015). Besides the model description, we demonstrate its application using the wide range of observational data from meteorite-producing fireballs appearing annually (such as Košice) to larger scale impacts (such as Chelyabinsk, Sikhote-Alin and Tunguska).
REFERENCES
Bouquet A., Baratoux D., Vaubaillon J., Gritsevich M.I., Mimoun D., Mousis O., Bouley S. (2014): Planetary and Space Science, 103, 238-249, http://dx.doi.org/10.1016/j.pss.2014.09.001
Gritsevich
M., Koschny D. (2011): Icarus, 212(2), 877-884, http://dx.doi.org/10.1016/j.icarus.2011.01.033
Gritsevich
M.I., Stulov V.P., Turchak L.I. (2012): Cosmic Research, 50(1), 56–64, http://dx.doi.org/10.1134/S0010952512010017
Moreno-Ibáñez
M., Gritsevich M., Trigo-Rodríguez J.M. (2015): Icarus, 250, 544-552, http://dx.doi.org/10.1016/j.icarus.2014.12.027