Top: images from each of the five epochs. Bottom: 2D marginal position posterior at each epoch. This shows the a posteriori most likely positions for an inner planet at each epoch. Note that the posterior is calculated jointly from all images; this figure merely visualizes it at individual epochs. Even epochs where the location is poorly constrained can still contribute to the S/N of the model as a whole by reducing the space of plausible orbits and planet photometry.