  Relative proper motions and cluster membership probabilities of 30 stars
within an area of 14' of diameter centered in the open cluster NGC1662
(\alpha=04^{\rm h}48^{\rm m}, \delta=+10^{\rm o}56') are determined by
combining positions of stars observed by the Valinhos CCD meridian circle with
those from other astrometric catalogues. Our basic source for first epoch of
stars brighter than B=13 magnitudes is the AC2000 Catalogue, which provides a
time baseline of about 90 years, whereas the USNO-A2.0 Catalogue is used for
fainter stars, providing a time baseline of about 40 years in this region.
Average accuracies in proper motion of 2 mas/yr and 7 mas/yr are achieved,
respectively, when the AC2000 or the USNO-A2.0 is used. Membership
determination is obtained by applying the Zhao & He (1990) method. The cluster
proper motion was found to be (-3.2\pm 0.6) mas/yr in right ascension and
(-1.6\pm 0.6) mas/yr in declination.
