Representative figure of the comparison between observations and model of comet 30P/Reinmuth 1. Left panels: isophote fields a) March 10, 2010; and b) May 15, 2010. In both cases, isophote levels are 2.00 × 10^-13, 0.75 × 10^-13, and 0.25 × 10^-13 SDU. The black contours correspond to the OSN observations and the red contours to the model. Vertical bars correspond to 10⁴ km on the sky. Right panel: parameter Afρ versus heliocentric distance. The black dots correspond to Cometas-Obs data, and the green triangles are the OSN data, which correspond to March 10 and May 15, 2010. The red line is the model. The observations and the model refer to ρ = 10⁴ km. In Appendix C, the comparison between observations and models for each comet individually are displayed (see Figs. C.1 to C.7).