Using the MOJAVE data (Lister et al. 2009b), we plot the trajectories of C5 and C10. Component C10 is probably ejected by the VLBI core and component C5 is ejected with a large offset from the VLBI core. Components C5 and C10 follow two different trajectories and are ejected from different origins, indicating that the nucleus of 3C 279 contains a BBH system. Note that the origin of this caption corresponds to the origin of the ejection of component C5, thus all MOJAVE coordinates have been corrected for the offsets ΔW ≈  +405 μas and ΔN ≈  +110 μas.