\begin{table}%t4
%\centering
\par
\caption{Systematic uncertainty contributors on the distance of RS~Pup.
\label{systematics}}
\begin{tabular}{lcc}
\hline\hline
Term & Value & $\sigma_{\rm syst}$ \\
\hline
\noalign{\smallskip}
Pixel scale & $0.1665 \pm 0.0006^{\prime\prime}$ & 0.4\% \\
\noalign{\smallskip}
Position of RS~Pup & $\pm $$0.2$~pixel & 0.3\% \\
\noalign{\smallskip}
Reference epoch & ${\rm MJD}~54090.836 \pm 0.08$ & 0.2\% \\
\noalign{\smallskip}
Photometric period & $41.4389 \pm 0.02~{\rm days}$ & 0.2\% \\
\noalign{\smallskip}
Choice of features & $\pm 16$~pc (see text) & 0.8\% \\
\hline
Total & $\pm$20~pc & 1.0\% \\
\hline
\end{tabular}
\end{table}