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We report on the results of multi-epoch VLBI observations with VERA (VLBIExploration of Radio Astrometry) of the 22 GHz H2O masers associated with theyoung stellar object SVS 13 in the NGC 1333 region. We have carried outphase-referencing VLBI astrometry and measured an annual parallax of the maserfeatures in SVS 13 of 4.25+/-0.32 mas, corresponding to the distance of235+/-18 pc from the Sun. Our result is consistent with a photometric distanceof 220 pc previously reported. Even though the maser features were detectableonly for 6 months, the present results provide the distance to NGC 1333 withmuch higher accuracy than photometric methods. The absolute positions andproper motions have been derived, revealing that the H2O masers with the LSR(local standard of rest) velocities of 7-8 km s-1 are most likely associatedwith VLA4A, which is a radio counterpart of SVS 13. The origin of the observedproper motions of the maser features are currently difficult to attribute toeither the jet or the rotating circumstellar disk associated with VLA4A, whichshould be investigated through future high-resolution astrometric observationsof VLA4A and other radio sources in NGC 1333.

Astrometry of Water Maser Sources in Nearby Molecular Clouds with VERA - II. SVS 13 in NGC 1333