Comparison between observational data and the models proposed for the comet 103P/Hartley 2. Afρ measurements have been corrected using Eq. (1). Black dots are the data from Cometas-Obs, and green triangles marked from (a) to (d) are the observations at OSN telescope. The red line corresponds to Model I or Hyperactive model, which fits the observations in Fig. 9. The blue line is the Model II or Standard model, and its fits with observations can be checked in Fig. 10. All the Afρ values are referred to ρ = 10⁴ km.