\begin{table}%t1
\par
\caption {\label{astro}Absolute astrometric parameters for TWA22~AB
 and radial \mbox{velocity} derived in this
work.} 
%\centerline
 {   \begin{tabular}{ccccc}
    \hline\hline
      $\pi$ 	& $d$ & $\mu_{\alpha}\cos(\delta)$  & $\mu_{\delta}$ &$V_{\rm rad}$  \\
        mas &pc &mas/yr                             & mas/yr                       & km~s$^{-1}$  \\
     \hline\noalign{\smallskip}{\smallskip}
       57.0 $\pm$0.7	&$17.5\pm 0.2$	&$-175.8\pm0.8$  &$-21.3\pm 0.8$ &$14.8\pm2.1$\\
\hline
  \end{tabular}
  }
\end{table}