Envelopes in semimajor axis of the Polana and Eulalia families over the full magnitude range. The “V” shapes are due to size-dependent drift from the Yarkovsky effect (see D. Vokrouhlický et al. 2006). Objects in this work are represented by star shapes with colors corresponding to the family envelope outline, with the three PFAs: (2441) Hibbs, (6712) Hornstein, and (6769) Brokoff (shown in pink) and (495) Eulalia (in blue). (142) Polana is highlighted as a pink diamond for reference, with Polana and Eulalia family members in light pink and dark blue dots, respectively.