Large-scale astrometric vector residuals. For each UCAC5 reference star which is used to fit the astrometry of an image, the arrow gives the magnitude and direction of the difference between the coordinates of the star, at the epoch of the plate, and the fitted coordinates of the corresponding star on the CduC image. The data is shown separately for each of the four partly overlapping images of plate #890. The scale is shown in the lower right corner of image 2.