Fit of the two coordinates W(t) and N(t) of component C5 of 3C 279. They correspond to the solution with T_p/T_b ≈ 140, M₁/M₂ ≈ 2.75, and i_o ≈ 10.4°. The points are the observed coordinates of component C5 that were corrected for the offsets ΔW ≈  +405 μas and ΔN ≈  +110 μas. VLBI coordinates are taken from Lister et al. (2009a). The red lines are the coordinates of the component trajectory calculated using the BBH model.