Synchrones and syndynes of 311P/PanSTARRS. The blue dot at the origin denotes the position of 311P. The synchrones are shown as red dashed lines, with the dust release time prior to the date of the observation labeled as red texts, and the labeled dates increase anticlockwise with intervals of 3 days. The syndynes are drawn as blue solid lines, with the values of the grain radius (corresponding to different values of β) labeled as blue text. Celestial north is up, and east is to the left. The units of R.A. and decl. are arcseconds (″).