“Two-Body” Problem: Barycenter vs Waxwing

After watching the neighborhood waxwings consume their fill of berries prior to moving on, I pondered a different kind of a two-body problem:

“Two-Body” Problem: Barycenter vs Waxwing

After watching the neighborhood waxwings consume their fill of berries prior to moving on, I pondered a different kind of a two-body problem: