\begin{table}%t4
\caption{Basic kinematical data for the main morphological features
  in NGC~6309. Angular distance and position angle~(PA) are measured
  from the central star. Radial velocity is measured with respect to
  the systemic velocity ($-$32~km~s$^{-1}$) from the emission line
  indicated in the last column. Uncertainties for the first row
  apply to the rest.}\label{knots}
\small%\centering
\par
\begin{tabular}{cllll}
\hline \hline
Feature   &  PA                 & Angular                  & Radial             & Emission\\
          &  (\degr)&             distance    &              velocity           &              line    \\
          &         &             ($\arcsec$) &              (km~s$^{-1}$)                  &         \\
\hline
%&&&& \\[-8pt]
 {\bf R1} & --15 $\pm$ $4\degr\phantom{XX}$&9 $\pm$ $3\arcsec$&    0 $\pm$ $2$~km~s$^{-1}$&              [\ion{O}{iii}] \\
 {\bf R2} & +165          &  10               &   0                             &              [\ion{O}{iii}]\\
 {\bf R3} &  +75          &   4               & +23                             &              [\ion{O}{iii}]\\
 {\bf R4} &--105          &   4               &--23                             &              [\ion{O}{iii}]\\
 {\bf E1} &  +50          &  30               & +35                             &              [\ion{O}{iii}]\\
 {\bf E2} &  +60          &  26               & +36                             &              H$\alpha$, [\ion{O}{iii}]\\
 {\bf E3} &  +70          &  27               & +35                             &              H$\alpha$     \\ 
 {\bf E4} &  +90          &  25               & +24     &             H$\alpha$     \\
 {\bf W1} &--130          &  27               &--34                             &              H$\alpha$     \\
 {\bf W2} &--120          &  25               &--36                             &              H$\alpha$, [\ion{O}{iii}]\\
 {\bf W3} &--110          &  24               &--34                             &              H$\alpha$, [\ion{O}{iii}]\\
 {\bf W4} & --90          &  21               &--20                             &              H$\alpha$     \\
\hline
\end{tabular} 
\end{table}