Comparison of observed and modeled Afρ data as a function of heliocentric distance. Parameter Afρ versus heliocentric distance. The Afρ measurements have been corrected using Eq. (1). Black dots: Afρ data from Cometas-Obs. Green triangles: Afρ data derived from OSN images. Blue diamonds: Afρ data from Lulin observatory images. The observations labeled (a) to (g) correspond to the Afρ derived from images (a) to (g) in Fig. 5. The outbursts I (inbound) and II (outbound) described in the text are marked with arrows. All the Afρ values refer to ρ = 10⁴ km.