Top: an example of a median image of LASCO/C3. -V (dotted arrow) and -S (solid arrow) represent the antimotion and anti-Sun directions, respectively, at the location of the comet. The plasma tail is indicated by an orange arrow. Middle and bottom panels: the computed synchrone and syndyne models superimposed on the comet image to simulate the dust tails. The solid white curves are the modeled synchrones and syndynes calculated with the same parameters as those in Figure 4. North is up, east is to the left, and the region shown is ∼1.°9 × 1.°6 (120 × 100 pixels).