Proper orbital elements (panel a and b) and V-shape (panel c) plots of the 1999 XT17 family and the (221) Eos family. The members of Eos are displayed as grey crosses, and those of the 1999 XT17 family as circles. Black filled circles are 1999 XT17 family members that were classified as A-types by our algorithm, while the empty circles are members that were not classified as A-types. Family members that were classified A-types in the literature and have no DR3 spectra are marked as "X". Among the latter group, asteroid 76627 overlaps in the plot with asteroid 88052 (non A-type), due to their similar proper orbital elements and H magnitudes. The position of the 7:3 mean motion resonance with Jupiter is highlighted with a shade of light-grey. The V-shapes of the two families are drawn by eye following the equation H = 5log₁₀(|a − a_c|/C₀) with a_C = 2.942 au and C₀ = 1.8 × 10⁻⁵ au for the 1999 XT17 family, and a_C = 3.017 au and C₀ = 2.25 × 10⁻⁴ au for the Eos family.