Using image orthicon techniques with the 12-in. telescope at the Organ Mountain Station of Dearborn Observatory, 242 positions of 17 asteroids and of the planet Pluto have been obtained. By the method of linear interpolation, it appears that the positional accuracy obtainable with this telescope-image orthicon combination is about 4 sec of arc. However, owing to limitations which affect the selection of reference stars, additional errors can be as large as 40 sec of arc. It is concluded that, although the image orthicon is not adapted to precision astrometry, it can be used successfully for tracking faint objects.