\begin{table}%t1
\caption{\label{t1}Published results for the nature and evolutionary state of V645~Cyg.}  \small%\centerline
 {
\begin{tabular}{cccll}
\hline\hline
Sp.   & $A_V$ & $V$ & $D$  & Ref.         \\
type  & mag   & mag & kpc  &              \\
\hline
O7    & 4.2   & 15.1$^{a}$&$\ge$3, $\sim$6& Cohen (\cite{c77})\\
      & 3.6   &     &$\ge$1, $\le$6& Humphreys et~al. (\cite{hmb80})\\
A0    & 2.5   &     &3.5 $\pm$ 0.5   & Goodrich (\cite{g86})\\
\hline
\end{tabular}}
\medskip
Estimate of the star's spectral type is listed in Col.~1; interstellar extinction toward the object in Col.~2; object's visual brightness in Col.~3; distance toward the object in Col.~4; and a reference to the estimates in Col.~5; $^{a}$~the brightness for the knot~N0.
\end{table}