Proper motions of H₂O (upper panel) and CH₃OH (lower panel) masers in AFGL 5142 MM–1 as measured relative to their centers of motion, independently calculated for water (cross) and methanol (star) masers. The rectangle in the upper panel shows the area plotted in the lower panel. The cones indicate orientation and uncertainties of the measured proper motions (the amplitude scale is given in each panel) and colors denote l.o.s. velocities. Contour maps show the VLA 22 GHz (dotted line) and 8.4 GHz (dashed line) continuum emissions. The black star in the lower panel identifies the putative location of the protostar.