(Main) Measurement of detected R.A. positions from real-time observations versus predicted R.A. from Horizons for asteroids 2024 ON (left) and 4953 (right). We set the initial R.A. position of the first asteroid detection at 0.0. A line of y = x is overplotted. (Insets) The residuals of the detected R.A. to the predicted R.A. For 2024 ON, seven observations were done in groups of five exposures every ∼45 minutes. For 4953, 1049 observations were collected at six different times in groups of ∼four to five exposures per minute.