Every time that the distance between the Earth and any of the asteroids of the sample is smaller than 100 Earth radii (100 R⊕), we considered that there was an encounter at time te. We integrate 5 days in the past to obtain the initial conditions of the encounter. In this figure, d is the impact parameter, V∞ the relative velocity of the encounter, q the minimum distance of the encounter, and Vq the relative velocity at this point.
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