\begin{table}%t1
%\centering
\par
\caption{\label{tab1}Distribution of the B1900.0  centers of the 1400 $2^\circ \times 2^\circ$  fields of the Sydney Observatory Astrographic  Program.}
\par
\small
\begin{tabular}{ccccccc}
\hline\hline 
$\delta_0$& $n$ & $\Delta\alpha$ & $(\alpha_0)_j,1\leq j\leq n$ & Epoch & $k$ &   $m$ \\
\hline
--52$^\circ$ & 120 & 12$^m$ &   12$^m$($j-1$) & 1924.14~$\pm$~9.24  & 3  & 5 \\
--53$^\circ$ & 120 & 12$^m$ & 6$^m$+12$^m$($j-1$) & 1902.30~$\pm$~4.04 & 12  &17   \\
--54$^\circ$ & 120 & 12$^m$ &   12$^m$($j-1$) & 1928.05~$\pm$~2.12 & 3  & 10   \\
--55$^\circ$ & 120 & 12$^m$ & 6$^m$+12$^m$($n-1$) & 1900.55~$\pm$~3.04 & 12 & 17  \\
--56$^\circ$ & 120 & 12$^m$ &   12$^m$($j-1$) & 1928.62~$\pm$~1.95 & 3 & 13   \\
--57$^\circ$ & 120 & 12$^m$ & 6$^m$+12$^m$($j--1$) & 1901.27~$\pm$~3.33 & 20 & 23  \\
--58$^\circ$ & 120 & 12$^m$ &   12$^m$($j-1$)& 1929.19~$\pm$~1.17 & 6  & 23   \\
--59$^\circ$ & 120 & 12$^m$ & 6$^m$+12$^m$($j-1$) & 1901.47~$\pm$~3.23 & 28 & 37  \\
--60$^\circ$ &  90 & 16$^m$ &   16$^m$($j-1$) & 1928.82~$\pm$~2.67  & 11 & 17 \\
--61$^\circ$ &  90 & 16$^m$ & 8$^m$+16$^m$($j-1$)& 1902.67~$\pm$~4.53 & 24 & 25 \\
--62$^\circ$ &  90 & 16$^m$ &   16$^m$($n-1$) & 1929.63~$\pm$~0.83  & 11 & 22 \\
--63$^\circ$ &  90 & 16$^m$ & 8$^m$+16$^m$($j-1$) & 1902.51~$\pm$~3.97 & 24 & 25 \\
--64$^\circ$ &  80 & 18$^m$ &   18$^m$($j-1$) & 1929.90~$\pm$~0.54  & 8 & 7  \\
\hline
\end{tabular}
\end{table}