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We present the results of multi-epoch VLBI observations of water masers inthe AGFL 5142 massive star forming region. We measure an annual parallax of$\pi=0.467 \pm 0.010$ mas, corresponding to a source distance of$D=2.14^{+0.051}_{-0.049}$ kpc. Proper motion and line of sight velocitiesreveal the 3D kinematics of masers in this region, most of which associate withmillimeter sources from the literature. In particular we find remarkablebipolar bowshocks expanding from the most massive member, AFGL 5142 MM1, whichare used to investigate the physical properties of its protostellar jet. Weattempt to link the known outflows in this region to possible progenitors byconsidering a precessing jet scenario and we discuss the episodic nature ofejections in AFGL 5142.

Trigonometric distance and proper motions of H2O maser bowshocks in AFGL 5142