\begin{table}%T1
\caption{Stellar parameters of the high mass CSPN from
  PHM, heliocentric radial velocities 
  \citep[from ][]{DAZ1998} and
  proper motion measurements. The last column gives the source of the
  proper motion values.}
\label{t:params}
%\centerline
$${\small
\begin{tabular}{llccclr@{$~\pm~$}lr@{$~\pm~$}lr@{$~\pm~$}ll}\hline\hline
PN~G        &Common name         &\teff  &$\log g$ 
                &$M$ &$d$ &\multicolumn{2}{c}{$v_{\rm rad}$}
    &\multicolumn{2}{c}{$\mu_\alpha$} &\multicolumn{2}{c}{$\mu_\delta$}
    &Source\\
        &  &(K)      &(${\rm cm~s^{-2}}$) &($M_\odot$) &(kpc) 
        &\multicolumn{2}{c}{(${\rm km~s^{-1}}$)}
    &\multicolumn{2}{c}{(${\rm mas~yr^{-1}}$)}
    &\multicolumn{2}{c}{(${\rm mas~yr^{-1}}$)}\\ \hline
025.3+40.8   &IC~4593         &40~000  &3.80   &1.11  &3.63
             &22.0&0.5      &$-$8.7&1.6   &4.1&1.5 &TY2\\
083.5+12.7   &NGC~6826        &44~000  &3.90   &1.40  &3.18
             &$-$6.2&0.6    &$-$11.0&2.9  &$-$9.7&1.7 &TRC\\
215.2$-$24.2 &IC~418          &39~000  &3.70   &1.33  &2.00
             &61.9&0.5      &$-$1.2&1.7   &2.5&1.8 &TRC\\
315.1$-$13.0 &Hen~2-131       &33~000  &3.10   &1.39  &5.62
             &$-$1.2&4.4    &$-$2.1&1.6   &$-$5.1&1.6 &TY2\\
316.1+08.4   &Hen~2-108       &39~000  &3.70   &1.33  &6.76
             &$-$11.1&0.4   &$-$0.6&2.7     &$-$1.1&2.5 &TY2\\
345.2$-$08.8 &IC~1266, Tc~1  &35~000  &3.62   &1.37  &3.73
             &$-$84.1&4.7   &$-$1.6&2.2     &$-$11.4&2.2  &TY2\\ \hline
\end{tabular}}
$$
\medskip
TY2: Tycho-2 catalogue \citep{HFM2000}; TRC: Tycho reference catalogue \citep{HKB1998}.
\end{table}