\begin{table}%t2
%\centering
\par
\caption{Proper motion (in mas~yr$^{-1}$) for \object{PG~1034+001} from different sources.\label{tab_pm}}
\begin{tabular}{cccc}
\hline\hline
\noalign{\smallskip}
& Hewett \ea\ (2003) & UCAC2 & USNO-B\\
\hline       
\noalign{\smallskip}
$\mu(\alpha$)cos($\delta)$ &  	$-86 \pm 5$ & $-83.7 \pm 3.3$ & $-80 \pm 4$\\
$\mu(\delta$)& $+31 \pm 5$ & $+28.9 \pm 1.5$ & $+32 \pm 4$\\
\hline
\end{tabular}
\end{table}