\begin{table}%t1
\caption{\label{polpos}Spin axis orientation.} 
%\centerline
 {\small \begin{tabular}{llllll} 
\hline \hline
\multicolumn{1}{c}{$\alpha_{\omega}$} & \multicolumn{1}{c}{$\delta_{\omega}$} & 
\multicolumn{1}{c}{$pa_{\omega}$} & \multicolumn{1}{c}{$\theta_{\omega}$} & 
\multicolumn{1}{c}{Epoch} & \multicolumn{1}{c}{Ref.$^{a}$} \\ 
\hline 
\phantom{0}30\degre & \phantom{-}45\degre & \phantom{0}66\degre & 143\degre & May--Nov. 1996 & [1] \\ 
170\degre & --40\degre & 272\degre & \phantom{00}9\degre & May--Nov. 1996 & [2] \\ 
240\degre & --56\degre & 224\degre & \phantom{0}53\degre & May--Nov. 1996 & [2] \\ 
275\degre & --50\degre & 217\degre & \phantom{0}74\degre & Mar.--Nov. 1996 & [3] \\ 
320\degre & --60\degre & 189\degre & \phantom{0}78\degre & Sep. 1995--Jan. 1998 & [4] \\ 
290\degre & --40\degre & 215\degre & \phantom{0}88\degre & Sep. 1996--May 1997 & [5] \\ 
290\degre & --60\degre & 203\degre & \phantom{0}72\degre & Feb. 18, 1997 & [6] \\ 
255\degre & --60\degre & 216\degre & \phantom{0}59\degre & Feb. 1997 & [2] \\ 
275\degre & --57\degre & 211\degre & \phantom{0}68\degre & Feb.--Mar. 1997 & [7] \\ 
276\degre & --54\degre & 213\degre & \phantom{0}71\degre & Apr. 1996--May 1997 & [8] \\ 
\hline 
\end{tabular}}
\medskip  
Columns~1 and~2 are the equatorial coordinates found in the literature.  Columns~3 and~4 are the corresponding position angle (\paw) and aspect angle (\thw)  on 11~March, 1997. $^{a}$ [1]~:~\citet{sekanina97}; [2]~:~\citet{sekanina99}; [3]~:~\citet{licandro99}; [4]~:~\citet{biver98}; [5]~:~\citet{metchev98}, [6]~:~\citet{vas99a}; [7]~:~\citet{jorda99}; [8]~:~\citet{sch04}. 
\end{table}