\begin{table}%t2
     %\begin{minipage}[t]{\columnwidth}			
     \caption{\label{LPresults}Summary of available results from image analysis of Long Period Comets.}
     %\renewcommand{\footnoterule}{}			
     %\centerline
{\begin{tabular}{c c c c c c}
     \hline\hline\noalign{\smallskip}
      Comet & $r_{\rm h}^a$& log$_{10}\rho$ (km)$^b$ 
      & $m_R$$^c$ 
      & A{\it f}$\rho$ (cm) $^d$ 
      & Reference \\
     \hline
     C/1999 T2 (LINEAR) & 3.35 & ? & 15.9 & & Szab\'o et~al. (\cite{Szabo01}) \\
     C/2000 H1 (LINEAR) & 3.89 & 3.9 & 19.7 & 38$^\ddagger$ & Szab\'o et~al. (\cite{Szabo01}) \\
     C/2000 SV74 (LINEAR) & 4.04 & 2 & 15.3 & 1892 & Szab\'o et~al. (\cite{Szabo02}) \\     
     C/1995 O1 (Hale-Bopp) & 4--13 &  &  & 3 $\times$ 10$^3$ - 8 $\times$ 10$^4$$^e$%\footnote{Derived from
     %a theoretical model} & Fulle et~al. (\cite{Fulle98}) 
     \\     
     C/1999 N4 (LINEAR) & 5.5 & ? & 18.8$^\dagger$ & & Szab\'o et~al. (\cite{Szabo01}) \\
     C/1999 F2 (Dalcanton) & 5.51 & 4.07 & 19.1 & 172$^\ddagger$ & Szab\'o et~al. (\cite{Szabo01}) \\
     C/2000 K1 (LINEAR) & 6.43 & ? & 18.4$^\dagger$ & & Szab\'o et~al. (\cite{Szabo01}) \\
     C/2003 O1 (LONEOS) & 7.02--8.18 & $^\S$ & 11.37--12.9$^\#$ & 1.3 $\times$ 10$^3$ - 318 & Meech et~al. (\cite{Meech09}) \\
     C/1999 J2 (Skiff) & 7.14 & ? & 17.7$^\dagger$ & & Szab\'o et~al. (\cite{Szabo01}) \\
                       & 7.11--10.1 & $^\S$ & 9.9--13.4$^\#$ & 4.7 $\times$ 10$^3$ - 234 & Meech et~al. (\cite{Meech09}) \\     
     C/2001 Q4 (NEAT) & 8.6 & 4 &  & 1500 & Tozzi et~al. (\cite{Tozzi03}) \\
                      & 5.84 & $^\S$ & 13.11$^\#$ & 304 & Meech et~al. (\cite{Meech09}) \\
     C/2001 G1 (LONEOS) & 8.32--11.22 & $^\S$ & 11.1--14.2$^\#$ & 1.8 $\times$ 10$^3$ - 28 & Meech et~al. (\cite{Meech09}) \\
     C/2003 A2 (Gleason) & 11.49--14.04 & $^\S$ & 11.6--12.8$^\#$ & 1.2 $\times$ 10$^3$ - 407 & Meech et~al. (\cite{Meech09}) \\
     C/1995 O1 (Hale-Bopp) & 13 & 5.3 & & 3 $\times$ 10$^4$ & Weiler et~al. (\cite{Weiler03}) \\
     C/1983 O1 (Cernis) & 19.4 & ? & 23 & & Meech (\cite{Meech92}) \\
     C/1995 O1 (Hale-Bopp) & 25.8 & ? & 20 &  & Szab\'o et~al. (\cite{Szabo08}) \\     
     \hline
     \end{tabular}}
     \medskip
\par
     $^a$ Heliocentric distance (AU) of observation. $^b$ Linear radius of the reference aperture at the comet. The symbol $\S$
      corresponds to values by Meech et~al. (\cite{Meech09}) computed all using a 3.0$^{\prime\prime}$ radius photometric
      aperture. $^c$ Integrated $R$ magnitude in the reference aperture. $^\dagger$ Indicates a value
      obtained as the mean of the given light curve. \# Indicates the average reduced $R$ magnitude for $r
      = \Delta = 1$ and $\alpha = 0^{\circ}$. $^d$ $^\ddagger$ Indicates that the value is not given by the 
      respective authors in the reference, but it has been computed for this paper with their data 
      by means of Eq.~(2) (see text). $^e$ Derived from
     a theoretical model.
     %\end{minipage}					
    \end{table}