PROPER MOTIONS IN THE FIELD OF THE GLOBULAR-CLUSTER NGC6934

We measured relative proper motions with a typical accuracy of 1.0 mil liarcsec/year (mas/a) for 2000 stars in a 1-degree.4 x 1-degree.4 fiel d around the low-latitude globular cluster NGC 6934. Four plates taken with the Bonn double refractor, spanning an epoch difference of 62 ye ars, were digitized completely. Within the tidal radius of the cluster , we find 106 stars with proper motion errors less than 5 mas/a. Membe rship probabilities are computed taking into account the individual pr oper motion errors and the radial distances to the cluster centre. We derive the mean relative proper motion of NGC 6934 using stars with hi gh membership probabilities from radial velocities (Smith and Bell 198 6) or from their location in the colour-magnitude diagram (Harris and Racine 1973). The relative proper motions of four Hipparcos stars in t he field will be used to obtain the absolute proper motion of NGC 6934 once the extragalactically calibrated Hipparcos Output Catalogue is a vailable.