Table 3: The "relative abundance of coarser grains'' (g) for different comets along with their orbital parameters.
Comet Scatt. angle No. of data q T Reference Estimated Source of
  range ($^{\circ}$) points       values of a, b, g pol. data
Austin 72-165 6 0.350 $\infty$ IAUC 4972/ -0.283, -5.24, -1.28 Chernova et al. (1993)
(1990 V) ($\lambda =$ 485 nm)       MPC 16001   Sen et al. (1991b)
  71-117 4          
  ($\lambda =$ 684 nm )            
Bradfield 124-147 7 0.871 $\infty$ IAUC 4442 -0.169, -4.57, -2.20 Kikuchi et al. (1989)
(1987 XIII) ($\lambda =$ 485 nm)           Chernova et al. (1993)
Faye 154-157 4 1.59 7.34 MPC 27081 -0.184, -4.35, -1.77 Chernova et al. (1993)
(1991n) ($\lambda =$ 485 nm)            
Hale-Bopp 133-163 29 0.914 4000 \dag -0.248, -4.82, -1.35 Ganesh et al. (1998)
(C/1995 O1) ($\lambda =$ 485 nm)           Manset & Bastien (2000)
  133-177 57          
  ($\lambda =$ 684 nm)            
Halley 114-178 43 0.587 76.1 \dag -0.259, -4.42, -0.79 Bastien et al. (1986)
(1986 III) ($\lambda =$ 365 nm)           Kikuchi et al. (1987)
  114-178 71         Le Borgne et al. (1987)
  ($\lambda =$ 485 nm)           Sen et al. (1991a)
  114-162 25         Chernova et al. (1993)
  ($\lambda =$ 684 nm)            
Hyakutake 69-143 11 0.230 $\infty$ IAUC 6329 -0.257, -4.50, -0.91 Joshi et al. (1997)
  ($\lambda =$ 485 nm)           Kiselev & Velichko (1998)
(1996 B2) 69-143 13          
  ($\lambda =$ 684 nm)            
Kopff 143-162 6 1.59 6.46 MPC 34423 +0.174, -1.23, -3.67 Chernova et al. (1993)
(1983 XIII) ($\lambda =$ 485 nm)            
Levy 122-161 16 0.94 $\infty$ \dag -0.049, -3.17, -2.48 Chernova et al. (1993)
(1990 XX) ($\lambda =$ 485 nm)            

\dag Marsden & Williams (1995).

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