Accurate 3D fireball trajectory and orbit calculation using the 3D-FIRETOC automatic Python code
Peña-Asensio, Eloy (Institut de Ciències de l'Espai)
Trigo Rodríguez, Josep Maria (Institut de Ciències de l'Espai)
Gritsevich, Maria (Finnish Geospatial Research Institute)
Rimola, Albert (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2021
Resum:	The disruption of asteroids and comets produces cm-sized meteoroids that end up impacting the Earth's atmosphere and producing bright fireballs that might have associated shock waves or, in geometrically favourable occasions excavate craters that put them into unexpected hazardous scenarios. The astrometric reduction of meteors and fireballs to infer their atmospheric trajectories and heliocentric orbits involves a complex and tedious process that generally requires many manual tasks. To streamline the process, we present a software package called SPMN 3D Fireball Trajectory and Orbit Calculator (3D-FIRETOC), an automatic Python code for detection, trajectory reconstruction of meteors, and heliocentric orbit computation from video recordings. The automatic 3D-FIRETOC package comprises of a user interface and a graphic engine that generates a realistic 3D representation model, which allows users to easily check the geometric consistency of the results and facilitates scientific content production for dissemination. The software automatically detects meteors from digital systems, completes the astrometric measurements, performs photometry, computes the meteor atmospheric trajectory, calculates the velocity curve, and obtains the radiant and the heliocentric orbit, all in all quantifying the error measurements in each step. The software applies corrections such as light aberration, refraction, zenith attraction, diurnal aberration, and atmospheric extinction. It also characterizes the atmospheric flight and consequently determines fireball fates by using the α − β criterion that analyses the ability of a fireball to penetrate deep into the atmosphere and produce meteorites. We demonstrate the performance of the software by analysing two bright fireballs recorded by the Spanish Fireball and Meteorite Network (SPMN).
Ajuts:	Agencia Estatal de Investigación PGC2018-097374-B-I00 Agencia Estatal de Investigación CTQ2017-89132-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1323 European Commission 865657
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Methods: analytical ; Methods: data analysis ; Earth ; Meteorites ; Meteors ; Meteoroids ; Planets and satellites: atmospheres
Publicat a:	Monthly Notices of the Royal Astronomical Society, Vol. 504, Issue 4 (July 2021) , p. 4829-4840, ISSN 1365-2966

DOI: 10.1093/mnras/stab999

12 p, 4.3 MB

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