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These small debris particles are brightly illuminated by the Sun, and are easily seen by the coronagraphs if they wander into the field of view. They are tremendously out-of-focus, and often appear as "donut" shapes in the COR1 and COR2 telescopes because of the central occulter in these telescopes. The bigger the piece of debris appears, the closer it is to the telescope. Because the COR1 and COR2 images are generally built up from a series of images, the same piece of debris will often show up multiple times