\begin{table}%t5
\caption{\label{tab:calastro}Mean plate scale and true north orientation for each observing
run. }
%\centering
\par
\begin{tabular}{lllll}     % 7 columns 
\hline\hline       
ESO Program     & UT Date                 &       Obj.       & Platescale        & True north     \\
                &                         &                  & (mas)             & (deg)              \\
\hline
070.C-0565      & 21-11-2002              & S13              & $13.24\pm0.05$    & $-0.05\pm0.10$   \\
                & 21-11-2002              & S27              & $27.01\pm0.05$    & $0.08\pm0.18$    \\
070.D-0271      & 16-03-2003              & S13              & $13.21\pm0.11$    & $-0.05\pm0.10$   \\
071.C-0507      & 29-05-2003              & S13              & $13.24\pm0.05$    & $-0.10\pm0.10$   \\
                & 03-06-2003              & S27              & $27.01\pm0.05$    & $0.01\pm0.19$    \\
071.C-0507      & 07-09-2003              & S13              & $13.24\pm0.05$    & $0.05\pm0.10$    \\
072.C-0644      & 05-03-2004              & S13              & $13.24\pm0.05$    & $0.04\pm0.10$    \\
                & 05-03-2004              & S27              & $27.01\pm0.05$    & $-0.18\pm0.20$   \\
073.C-0469      & 27-04-2004              & S27              & $27.01\pm0.05$    & $0.08\pm0.20$    \\
073.C-0469      & 22-09-2004              & S13              & $13.25\pm0.05$    & $0.20\pm0.10$    \\
                & 22-09-2004              & S27              & $27.01\pm0.05$    & $0.0\pm0.19$     \\
075.C-0521      & 19-08-2005              & S13              & $13.25\pm0.06$    & $-0.02\pm0.10$   \\
                & 19-08-2005              & S27              & $27.01\pm0.06$    & $-0.07\pm0.11$   \\
076.C-0554      & 08-01-2006              & S13              & $13.25\pm0.06$    & $0.18\pm0.10$    \\
                & 08-01-2006              & S27              & $27.02\pm0.06$    & $0.12\pm0.13$    \\
076.C-0554      & 28-02-2006              & S13              & $13.25\pm0.06$    & $0.19\pm0.10$    \\
                & 28-02-2006              & S27              & $27.02\pm0.05$    & $0.13\pm0.14$    \\
078.C-0494      & 24-10-2006              & S13              & $13.26\pm0.07$    & $-0.19\pm0.23$   \\
                & 23-12-2006              & S13              & $13.26\pm0.08$    & $-0.23\pm0.15$   \\
                & 22-10-2006              & S27              & $27.01\pm0.03$    & $-0.30\pm0.16$   \\
                & 25-12-2006              & S27              & $27.01\pm0.04$    & $-0.20\pm0.18$   \\
079.C-0908      & 18-07-2007              & S27              & $27.01\pm0.05$    & $-0.06\pm0.15$   \\
\hline                  
\end{tabular}
\end{table}