We present Spitzer IRAC images of the HH 111 outflow , that show a wealth of condensations/knots in both jet and counterjet .
Studying the positional distribution of these knots , we find very suggestive evidence of a mirror symmetric pattern in the jet/counterjet flow .
We model this pattern as the result of an orbital motion of the jet source around a binary companion .
From a fit of an analytic , ballistic model to the observed path of the HH 111 system , we find that the motion in a binary with two \sim 1 M _ { \odot } stars ( one of them being the HH 111 source ) , in a circular orbit with a separation of \sim 186 AU would produce the mirror symmetric pattern seen in the outflow .