Strength of NG acceleration acting on cometary nuclei at per- ihelion for six comets with determined NG parameters using PRE and POST data arcs, separately; both axes are on logarithmic scales. The value of F_NG,max is calculated as: . The blue tri- angles represent NG orbits using PRE datasets; green pentagons, POST datasets; and red dots, NG orbits based on the entire datasets. All use the g(r)-like function for CO with r₀ = 10 au. From the left to right, the comets shown are C/2017 M4, C/1997 BA₆, C/2000 SV₇₄, C/2015 O1, C/2008 FK₇₅, and C/2006 S3. The three black dotted lines show 10⁻³, 10⁻⁴, and 10⁻⁵ of F_⊙(r), where F_⊙(r) = 0.59 · r⁻² is the solar gravita- tional acceleration in units of cm s⁻² if r is given in au.