\begin{table}%t1
\caption{\label{t:tucana}Tucana dwarf physical parameters.}
%\centerline
 {   
\small \begin{tabular}{lcc}
\hline\hline
Parameter & Tucana dwarf & Ref.\\
\hline
Type & dSph & -- \\
{RA, Dec} (J2000) & 22 41 49.6, $-$64 25 11 & (1) \\
{$l$, $b$} ($^{\circ}$) & 322.9, --47.4 & -- \\
{Distance} (kpc) & 880 & (2) \\
{$L_{\rm V}$} ($10^5 \lo$) & 5.5 & (3) \\
$v_{\rm sys}$ & 194.0 & (4) \\
{$R_{\rm core}$} ($''$) & 42 & (3) \\
{$R_{\rm tidal}$} ($''$) & 222 & (3) \\
{PA} ($^{\circ}$) & 97 & (3) \\
{$e$} & 0.48 & (3) \\
$V_{\rm HB}$ & 25.4 & (4)\\
Conversion 1$''$/pc & 4.3 & -- \\ 
\hline                  
\end{tabular}}
\medskip
(1) \citet{lav92}; (2) \citet{cas96, sav96};  (3) \citet{mat98};  (4)~this work.
\end{table}