Top-left panel: number of family core members found as a function of velocity cutoff, using the HCM. The second jump in the number of linked asteroids, at 460 m s−1, is our adopted value of velocity cutoff. Other panels: distribution of the X-complex asteroid with 0.1 < pV < 0.3 of the inner main belt in the three proper elements a, e, sin i. The cluster (of grey points) centred at (a, e, sin i) ~ (2.28, 0.144, 0.095 au) is the core of the Baptistina asteroid family.
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