Observed and simulated images in the vicinity of the head region on May 29.06 (panels (a), (b), and (c)) and June 8.91 (panels (d), (e), and (f)). The observations are in panels (a) and (d). The isotropic ejection model images are in panels (b) and (e), and the modified isotropic model including early dust ejection in the direction of unit vector (0.98, 0.18, 0.08) in the cometocentric frame are in panels (c) and (f). The arrows indicate the location of the westward extension described in the text, which appears in the observations and in the modified isotropic model, but not in the isotropic model. The upper panels have dimensions of 10,522 × 10,522 km, and the lower panels dimensions of 10,810 × 10,810 km.