[S II]λ6717 integrated line map with contours from the Hα radial velocity map. Blue contours range from −50 to −15 km s⁻¹ and red contours from 15 to 50 km s⁻¹. The white crosses correspond to the positions of HH-N and HH-S (upper and lower cross, respectively), the white circle indicates the location of an infrared point source (see Fig. 14), while the black arrows indicate the locations of knots a and b, as well as of two stellar sources.