\begin{table}%t3
\caption{Relative astrometry and photometry for the {\toric} binary system.}
\label{tab:position}
%\centering
\par
\begin{tabular}{lllccccccccc}
  \hline\hline
                         &                &        &                 &                 &             &      & \multicolumn{2}{c}{(O--C) Orbit \#1} & & \multicolumn{2}{c}{(O--C) Orbit \#2}\\
                         \cline{8-9} \cline{11-12}
  Telescope              & Date           & Filter & Flux ratio      & $\Theta^a$      & $\rho$      & Ref. & $\Theta$       & $\rho$       & & $\Theta$       & $\rho$      \\
                         &                &        & $F_{\rm C2}/F_{\rm C1}$ & [\degr] & [mas]       &      & [\degr]        & [mas]        & & [\degr]        & [mas]       \\
  \hline
   BTA~6~m/Speckle   & 1997.784             & $H$      & $0.26 \pm 0.02$ & $226.0 \pm 3$   & $33 \pm 2$      & b    & +3.0 & +0.0  && +3.0 & +0.5 \\
  BTA~6~m/Speckle   & 1998.838             & $K'$     & $0.32 \pm 0.03$ & $222.0 \pm 5$   & $37 \pm 4$      & b    & +3.8 & $-$2.6  && +3.8 & $-$2.5 \\
  BTA~6~m/Speckle   & 1999.737             & $J$      & $0.31 \pm 0.02$ & $214.0 \pm 2$   & $43 \pm 1$      & c    & $-$0.9 & +1.5  && $-$0.9 & +1.5 \\
  BTA~6~m/Speckle   & 1999.8189            & $G'$     & $0.35 \pm 0.04$ & $213.5 \pm 2$   & $42 \pm 1$      & --   & $-$1.1 & +0.5  && $-$1.1 & +0.5 \\
  BTA~6~m/Speckle   & 2000.8734            & $V'$     & $0.35 \pm 0.03$ & $210.0 \pm 2$   & $40 \pm 1$      & --   & $-$0.8 & $-$0.8  && $-$0.9 & $-$0.8 \\
  BTA~6~m/Speckle   & 2001.184             & $J$      & $0.29 \pm 0.02$ & $208.0 \pm 2$   & $38 \pm 1$      & c    & $-$1.6 & $-$2.1  && $-$1.7 & $-$2.1 \\
  BTA~6~m/Speckle   & 2003.8               & $J$      & $0.30 \pm 0.02$ & $199.3 \pm 2$   & $29 \pm 2$      & --   & +3.9 & +0.5  && +2.8 & +0.5 \\
  BTA~6~m/Speckle   & 2003.9254            & $V'$     & --              & $199.0 \pm 2$   & $29 \pm 2$      & --   & +3.6 & +1.3  && +3.4 & +1.3 \\
  BTA~6~m/Speckle   & 2003.928             & $V'$     & --              & $199.1 \pm 2$   & $29 \pm 2$      & --   & +3.8 & +1.3  && +3.6 & +1.3 \\
  BTA~6~m/Speckle   & 2004.8216            & $V'$     & $0.34 \pm 0.04$ & $190.5 \pm 4$   & $24 \pm 4$      & --   & +4.2 & +2.4  && +4.0 & +2.4 \\
  IOTA             & 2005.92055           & $H$      & $0.28 \pm 0.03$ & $162.74 \pm 2$  & $13.55 \pm 0.5$ & --   & $-$0.5 & +0.0  && $-$1.0 & +0.0 \\
  BTA~6~m/Speckle   & 2006.8               & $V'$, $R$  & --              & --              & ${<}15$           & --   & --   & --    && --   & --   \\
   \hline
\end{tabular}
\begin{flushleft}
  $^{a}$~Following the convention, we measure the position angle (PA) from north to east.\\
  References~--~$^{b}$~\cite{wei99}, $^{c}$~\cite{sch03a}.\\
\end{flushleft}
\end{table}