\begin{table}%t1
\caption{\label{tab1}Orbital elements and total~masses for six Hipparcos binaries.}
%\centering
\par
\begin{tabular}{r|rrrrrrrr}
\hline\hline
\multicolumn{1}{c|}{HIP} &
\multicolumn{1}{c}{$P$} &
\multicolumn{1}{c}{$T$} &
\multicolumn{1}{c}{$e$} &
\multicolumn{1}{c}{$a$} &
\multicolumn{1}{c}{$i$} &
\multicolumn{1}{c}{$\Omega$} &
\multicolumn{1}{c}{$\omega$}&
\multicolumn{1}{c}{$M_{\rm total}$}\\
\multicolumn{1}{c|}{} &
\multicolumn{1}{c}{(yr)} &
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{} &
\multicolumn{1}{c}{(mas)} &
\multicolumn{1}{c}{(degr)} &
\multicolumn{1}{c}{(degr)} &
\multicolumn{1}{c}{(degr)}&
\multicolumn{1}{c}{$(M_\odot)$}\\
\hline
11352 &~$6.85 \pm 0.05$ &~$1995.12\pm0.06$&~$0.284\pm0.006$ &~$100\pm1$ &
$50.0\pm0.6$ &~$15.1\pm0.9$ &~$4.4\pm1.6$ &$1.71 \pm0.27$ \\
14075 &~$13.89\pm0.11$ &~$1998.32\pm0.06$ &~$0.474\pm0.017$ &~$111\pm1$ &
$50.6\pm1.9$ &~$165.8\pm1.8$ &~$184.9\pm2.8$ &~$2.03\pm0.58$ \\
14230 &~$5.91\pm0.07$ &~$1999.31\pm0.04$ &~$0.876\pm0.009$ &~$110\pm5$ &
$68.5\pm2.1$ &~$21.4\pm0.9$ &~$144.1\pm1.9$&$1.47 \pm0.26$  \\
14669 &~$28.31\pm0.07$ &~$2009.16\pm0.07$ &~$0.138\pm0.004$ &~$569\pm7$ &
$96.8\pm0.3$ &~$13.2\pm0.2$ &~$165.6\pm1.0$ &~$0.84 \pm0.17$ \\
106972 &~$18.57\pm0.06$ &~$2005.23\pm0.06$ &~$0.186\pm0.005$ &~$268\pm1$ &
$71.0\pm0.3$ &~$144.7\pm0.3$ &~$42.2\pm1.3$&~$0.89 \pm0.25$ \\
111685 &~$16.77\pm0.15$ &~$1991.78\pm0.08$ &~$0.256\pm0.009$ &~$330\pm3$ &
$55.9\pm0.6$ &~$69.0\pm1.0$ &~$118.7\pm2.2$&$0.86 \pm0.10$\\
\hline
\end{tabular}
\end{table}