Use of the Semilinear Method to predict the Impact Corridor on Ground
| Autor: | Linda Dimare, Alessio Del Vigna, Fabrizio Bernardi, Davide Bracali Cioci |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Near-Earth object 010504 meteorology & atmospheric sciences Computer science Applied Mathematics Computation Monte Carlo method Impact time FOS: Physical sciences Astronomy and Astrophysics 01 natural sciences Impact monitoring Computational Mathematics Above ground Space and Planetary Science Asteroid Modeling and Simulation 0103 physical sciences Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) 010303 astronomy & astrophysics Algorithm Mathematical Physics 0105 earth and related environmental sciences Astrophysics - Earth and Planetary Astrophysics |
| Popis: | We propose an adaptation of the semilinear algorithm for the prediction of the impact corridor on ground of an Earth-impacting asteroid. The proposed algorithm provides an efficient tool, able to reliably predict the impact regions at fixed altitudes above ground with 5 orders of magnitudes less computations than Monte Carlo approaches. Efficiency is crucial when dealing with imminent impactors, which are characterized by high impact probabilities and impact times very close to the times of discovery. The case of 2008 TC3 is a remarkable example, but there are also recent cases of imminent impactors, 2018 LA and 2019 MO, for which the method has been successfully used. Moreover, its good performances make the tool suitable also for the analysis of the impact regions on ground of objects with a more distant impact time, even of the order of many years, as confirmed by the test performed with the first batch of observations of Apophis, giving the possibility of an impact 25 years after its discovery. |
| Databáze: | OpenAIRE |
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