\begin{table}%t5
     \caption{\label{Magnitude}Magnitude and A{\it f}$\rho$ of the target comets.}
     %\centerline
{\begin{tabular}{c c c c c c}
     \hline\hline
      Comet & $d(^{\prime\prime})$$^a$ 
      & {\it R} & $H_R$(1,1,0) & log$_{10}\rho$ (km)$^b$
	 &  A{\it f}$\rho$ (cm)\\
     \hline
     C/2003 O1 (LINEAR) & 2.65 & 19.11 $\pm$ 0.07 & 10.177 & 4.14 & 572 $\pm$ 37 \\
                        & 4.77 & 18.51 $\pm$ 0.07 &  9.577 & 4.40 & 552 $\pm$ 36 \\
     C/2004 K1 (Catalina) & 2.65 & 16.35 $\pm$ 0.07 & 11.212 & 3.82 & 585 $\pm$ 38 \\
                          & 4.77 & 15.80 $\pm$ 0.07 & 10.662 & 4.07 & 539 $\pm$ 35 \\
		          & 6.89 & 15.53 $\pm$ 0.07 & 10.392 & 4.23 & 479 $\pm$ 31 \\
		          & 9.54 & 15.33 $\pm$ 0.07 & 10.192 & 4.37 & 416 $\pm$ 27 \\
     \hline
     \end{tabular}}
     $^a$ Aperture diameter. $^b$ Linear radius of the aperture at the comet.
\par
\end{table}