Detection of an ancient family through the Yarkovsky V-shape. Top: the V-shape down in the a_p, 1/D plane. The inner and outer lobes of the V-shape are shown; these are requisite of the detection method, as described in the main text. As a proxy for membership, those within the interior lobes are considered to be family members and are shown as red dots. The purple dots are planetesimals, gray dots are uncategorized, and squares could be either planetesimals or ancient family members. Bottom: score map consisting of a stacked average of 700 Monte Carlo iterations in detecting the ancient family. The maxima gives the coordinates of the V-shapes vertex and slope parameters, a_c and K.