\begin{table} %t4
%\centering
\par
\caption{\label{pm}Yearly proper motion for CFBDSIR1458. }
\begin{tabular}{lccc} 
\hline   \hline      
RA (\arcsec yr$^{-1}$)       &   Dec (\arcsec yr$^{-1}$)    & RA (km~s$^{-1}$)      &
Dec (km~s$^{-1}$)        \\ 
\hline
+$0.17\pm0.016$ & --$0.41\pm0.016$ &18  & 46 \\ \hline
\end{tabular}
\tablefoot{The  systematic errors induced by chromatic refraction and parallax effects are not  
  corrected. The estimate of the absolute tangential velocity assumes a distance of 23 pc.}
\end{table}