\begin{table}%t1
\caption{\label{wro}Basic parameters of selected WN+O SB2 binaries.}
%\centerline
{\begin{tabular}{@{\extracolsep{\fill}}lccc}
\hline\hline
WR number                   & WR~21                & WR~127              & WR153 $^b$                    \\
%variable star name          & V398~Car             & QY~ Vul             & GP~Cep                       \\
HD number                   & HD~90657             & HD~186943           & HD~211853                    \\
%$v$ (mag)                   & 9.67                  & 10.33                & 9.08                          \\
%$b$~-~$v$ (mag)           & 0.27                  & 0.15                 & 0.27                          \\
%$d$ (kpc)                   & 3.9                   & 4.4                  & 2.8                           \\
spectral type               & WN5+O4-6              & WN3+O9.5V            & WN6/WCE+O3-6I          \\
$p$ (days)                  & 8.2546~$\pm$~0.0001 & 9.5550               & 6.6887                \\
$e$                         & 0.04~$\pm$~0.03     & 0.07~$\pm$~0.04    & 0~$+$~0                     \\
$q$                         & 0.52                  & 0.47                 & 0.54                          \\
$a$~sin~$i$ ($R_\odot$)   & 37~$\pm$~3          & 39~$\pm$~6         & $>$35.2                     \\
$M$~sin$^3$$i$ ($M_\odot$) & 8.4                   & 9.3                  &                               \\
$i$ ($^\circ$)              & 50~$\pm$~4          & 55~$\pm$~8         & 73                            \\
$M_{\rm WR}$ ($M_\odot$)    & 19                    & 17                   & $>$6                        \\
$M_{\rm O}$ ($M_\odot$)     & 37                    & 36                   & $>$21                              \\
%in cluster/ass.             &                       & Vul~OB2:            & Cep~OB1:                     \\
%in ring nebula              & {\sl IRAS shell}      & Anon(WR~127), S~92 & S~132 (r)                    \\
\hline
\end{tabular}}
\par
Notes: \\
$^a$  All parameters from compilation of \citet{2001NewAR..45..135V}, unless noted
     otherwise. \\
$^b$  \citet{2002ApJ...577..409D}. \\
\end{table}