Table 5: Comparison between mean values of the NG parameters derived from models with constant $A_{\rm {1}}, A_{\rm {2}}$, $A_{\rm {3}}$ and from models with a rotating spherical nucleus for the investigated sample of long-period (LP) comets and 20 short-period comets. Comets C/1991 T2 and C/1995 Y1 were excluded from the basic statistical analysis (17 LP comets) because another relations of h(r) (g*(r) with k=0 i.e. the power law or g(r)-like function with $r_{\rm {0}}\neq 2.808$ AU) probably are more adequate for them (see Table 2). Two next two comets (C/1998 P1 and C/1993 A1) with the greatest NG parameters and $(1/a)_{\bf {ori}} < 10^{-4}$ are excluded from the sample of 15 LP comets. LP models of a rotating spherical nucleus are taken from Table 4.
I. Long period comets; models with constant $\vec{A_1, A_{{2}}}$ and $\vec{A_{{3}}}$
  17 LP comets 19 LP comets 15 LP comets
Models with: g(r) $g_{\rm {S}}$(r) f(r) g(r) $_{{\rm best}\; r_{\rm {0}}}$ g(r)
${\big <}A^*{\big >}_{\rm {weighted}}\times 10^{8}$ AU day-2 1.75 $\pm$ 0.02 1.59 $\pm$ 0.02 1.21 $\pm$ 0.02 1.89 $\pm$ 0.02 1.53 $\pm$ 0.02
${\big <}\vert A^*_{\rm {2}}/A^*_{\rm {1}}\vert{\big >}_{\rm {weighted}}$ 0.065 $\pm$ 0.003 0.056 $\pm$ 0.003 0.054 $\pm$ 0.003 0.052 $\pm$ 0.003 0.081 $\pm$ 0.004
${\big <}F/F_{\odot}{\big >}_{\rm {weighted}}\times 10^{5}$ 5.94 $\pm$ 0.07 5.71 $\pm$ 0.07 4.42 $\pm$ 0.07 5.80 $\pm$ 0.07 5.20 $\pm$ 0.07
${\big <}A^*{\big >}\times 10^{8}$ AU day-2 6.43 $\pm$ 0.13 2.85 $\pm$ 0.17 2.40 $\pm$ 0.07 4.52 $\pm$ 0.09 4.07 $\pm$ 0.15
${\big <}\vert A^*_{\rm {2}}/A^*_{\rm {1}}\vert{\big >}$ 0.16 $\pm$ 0.02 0.20 $\pm$ 0.05 0.20 $\pm$ 0.03 0.23 $\pm$ 0.02 0.17 $\pm$ 0.02
${\big <}F/F_{\odot}{\big >}\times 10^{5}$ 21.8 $\pm$ 0.4 14.1 $\pm$ 0.6 11.6 $\pm$ 0.2 15.0 $\pm$ 0.2 13.8 $\pm$ 0.4
II. Models of a rotating spherical nucleus
  14 long-period comets 20 short-period comets
  (spherical nucleus) (non-spherical nucleus)
Models with: g(r) $g_{\rm {S}}$(r) f(r) g(r)
${\big <}A^*{\big >}_{\rm {weighted}}\times 10^{8}$ AU day-2 2.27 $\pm$ 0.03 2.16 $\pm$ 0.03 2.35 $\pm$ 0.02 0.3321 $\pm$ 0.0007
${\big <}\eta {\big >}_{\rm {weighted}}$ 9 $.\!\!^\circ$4 $\pm$ 0 $.\!\!^\circ$3 7 $.\!\!^\circ$3 $\pm$ 0 $.\!\!^\circ$22 7 $.\!\!^\circ$5 $\pm$ 0 $.\!\!^\circ$2 7 $.\!\!^\circ$14 $\pm$ 0 $.\!\!^\circ$02
${\big <}F/F_{\odot}{\big >}_{\rm {weighted}}\times 10^{5}$ 7.70 $\pm$ 0.07 7.35 $\pm$ 0.07 7.97 $\pm$ 0.07 1.128 $\pm$ 0.002
${\big <}A^*{\big >}\times 10^{8}$ AU day-2 7.45 $\pm$ 0.20 4.44 $\pm$ 0.11 4.05 $\pm$ 0.10 0.49 $\pm$ 0.04
${\big <}\eta {\big >}$ 18 $.\!\!^\circ$8 $\pm$ 1 $.\!\!^\circ$32 16 $.\!\!^\circ$0 $\pm$ 1 $.\!\!^\circ$2 16 $.\!\!^\circ$3 $\pm$ 1 $.\!\!^\circ$1 15 $.\!\!^\circ$1 $\pm$ 1 $.\!\!^\circ$2
${\big <}F/F_{\odot}{\big >}\times 10^{5}$ 25.3 $\pm$ 0.7 15.1 $\pm$ 0.4 13.8 $\pm$ 0.3 1.66 $\pm$ 0.14


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