\begin{table}%t1
\caption{Spectral type, visual apparent magnitudes, colour indices, number of
exposures ({\it N}), and
mean resulting signal-to-noise ratios (at $\lambda \approx$~ 6000 \AA) for the
program stars. The spectral types, magnitudes and colour indices are from the SIMBAD
database.}
\label{tab_1}
%\begin{center}
\par
\begin{tabular}{llcccc} \hline\hline
Star                & Spectral  &$V$ &$B-V$& $N$& $S/N$\\
                     &   type    & (mag)   & (mag)  & &\\\hline 
\object{HD 23249}  ($\delta$ Eri)  & K0 IV   & 3.50  & 0.93   & 2 &350 \\
\object{HD 198149} ($\eta$ Cep)    & K0 IV   & 3.41  & 0.94  & 1 &360 \\
\object{HD 222404} ($\gamma$ Cep)  & K1 IV   & 3.23  & 1.03   & 2 &320 \\ 
\object{HD 10780}                  & K0 V    & 5.63  & 0.81   & 2 &240 \\
\object{HD 4628}                   & K2 V    & 5.75  & 0.88   & 2 &210 \\
\object{HD 201091} (61 Cyg A)      & K5 V    & 5.21  & 1.18   & 2 &200 \\\hline
\end{tabular}
\begin{flushleft}
\end{flushleft}
%\end{center}
\par
\end{table}