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- W156713764 abstract "A hazard mitigation problem for the Apophis-Earth possible collision is analyzed in the paper. Taking into account the asteroid size, its velocity and energy (~ 10 megatons TNT) of the impact, this collision would give a great hazard for the Earth. Because of this, it is important to analyze the characteristics of the possible prevention for this collision. The orbit correction is studied in the paper. The paper describes firstly a method to determine the asteroid trajectories that are close to the nominal one but have the impacts on the Earth. This has allowed the determination of a set of these asteroid’s trajectories that collide with the Earth in 2036. An analysis of this set of the trajectories with the Earth-Apophis impact is performed; its characteristics are determined and presented. The necessary correction of the asteroid velocity to deflect it from the Earth in 2036 is analyzed. This analysis is performed for two options of the correction strategy. Firstly, this is the correction of a hitting trajectory to deflect only it from the Earth. Secondly, this is such a correction of the nominal trajectory, which deflects the whole “tube” of possible (for some probability) trajectories taking into account the errors of the trajectory determination from the observations performed. The two-impulse correction is analyzed, too. It is shown that if the correction of the Apophis orbit is performed before the asteroid-Earth approach in 2029, so the necessary velocity impulse for the correction will be less considerably than for the correction after the approach. Possibilities to use thermo-nuclear effect and impactkinetic one for this correction are estimated." @default.
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- W156713764 date "2007-01-01" @default.
- W156713764 modified "2023-09-26" @default.
- W156713764 title "An Analysis of the Correction Problem for the Near-Earth Asteroid (99942) Apophis=2004 MN4" @default.
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