\begin{table}%t3
\caption{\label{Table 3}OLS solution.}
%\centering
\small
\begin{tabular}{cc}
\hline\hline
Parameter & OLS solution \\ 
\hline
$A$ & 37.30902 $\pm$ 9.11299 \\ 
$B$ & 50.95015 $\pm$ 6.18534 \\ 
$2H$ & 27.40187 $\pm$ 11.21709 \\ 
$2G$ & 0.55520 $\pm$ 1.25959 \\ 
$2F$ & --0.45312 $\pm$ 0.95045 \\ 
$l$ & 1 \\ 
$C$ & --5.02616 $\times$ $10^{-5}\pm 6.36791 \times 10^{-5}$ \\ 
$P$ & 12.98 $\pm$ 0.72 yr \\ 
$T$ & 1953.53 $\pm$ 1.37 \\ 
$a^{\prime }$ & 0\farcs187 $\pm$ 0\farcs016 \\ 
$e$ & 0.066 $\pm$ 0.074 \\ 
$\Omega $ & 148\fdg263 $\pm$ 11\fdg835 \\ 
$i$ & 45\fdg740 $\pm$ 6\fdg426 \\ 
$\omega $ & 354\fdg762 $\pm$ 19\fdg515 \\ 
\hline
\end{tabular}
\end{table}