* Astronomy

Title: PF120916 Piecki fireball and Reszel meteorite fall
Author: A. Olech, P. oladek, Z. Tyminski, M. Stolarz, M. Wisniewski, M. Beben, T. Lewandowski, K. Polak, A. Raj, P. Zareba

On September 12, 2016, at 21:44:07 UT, a -9.2 ±0.5 mag fireball appeared over northeastern Poland. The precise orbit and atmospheric trajectory of the event is presented, based on the data collected by six video stations of Polish Fireball Network (PFN). The PF120916 Piecki fireball entered Earth's atmosphere with the velocity of 16.7 ± 0.3 km/s and started to shine at height of 81.9 ± 0.3 km. Clear deceleration started after first three seconds of flight, and the terminal velocity of the meteor was only 5.0 ± 0.3 km/s at height of 26.0 ±0.2 km. Such a low value of terminal velocity indicates that fragments with total mass of around 10-15 kg could survive the atmospheric passage and cause fall of the meteorites. The predicted area of possible meteorite impact is computed and it is located south of Reszel city at Warmian-Masurian region. The impact area was extensively searched by experienced groups of meteorite hunters but without any success.

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