\begin{table}%t3
%\centering
\par
\caption {Measured photometry of the selected nebular features. The~$x$ and~$y$ columns list the coordinates of the selected pixels in the data cube. The angular radius~$\theta_i$ of these pixels is counted in arcseconds from RS~Pup, and the azimuth is measured from north ($N=0^\circ$, $E=90^\circ$). The coordinates of RS~Pup in the image, in pixels from the bottom left, are $x=619.3 \pm 0.2$, $y=628.2 \pm 0.2$. ``Mean$_i$'' is the average value, and~$A_i$ the amplitude of the adjusted photometric curve, expressed in ADU and $\Delta \phi_i$ is the phase offset with respect to RS~Pup, with its associated total error (see text). $N_i$ is the computed integer number of periods between the variation cycle of RS~Pup and that of the feature. $d_i$ is the derived distance to RS~Pup. The six selected features for the final distance computation are marked with $*$ in the first column (see Sect.~\ref{Ni_calc} for details).
\label{photom_blobs}}
\begin{tabular}{lccccccccl}
\hline\hline
\# & $x$ (pix) & $y$ (pix) & $\theta_i$ ($^{\prime\prime}$) & Azimuth $(^\circ$) & Mean$_i$ (ADU) & $A_i$ (ADU)   & $\Delta \phi_i$ & $N_i$ & $d_i \pm \sigma$ (pc)  \\
\hline
\noalign{\smallskip}
1 & 578 & 748 & 21.10 & 139 & 185 $\pm$ 3 & 313 $\pm$ 11 & 0.983 $\pm$ 0.020 & 5 & 2034 $\pm$ 7 \\
2$*$ & 522 & 710 & 21.16 & 170 & 185 $\pm$ 15 & 280 $\pm$ 17 & 0.809 $\pm$ 0.012 & 5 & 1969 $\pm$ 5 \\
3$*$ & 493 & 659 & 21.65 & 196 & 175 $\pm$ 19 & 274 $\pm$ 43 & 0.989 $\pm$ 0.013 & 5 & 1985 $\pm$ 5 \\
4$*$ & 528 & 668 & 16.58 & 186 & 171 $\pm$ 11 & 241 $\pm$ 19 & 0.576 $\pm$ 0.009 & 4 & 1980 $\pm$ 4 \\
5$*$ & 549 & 694 & 16.03 & 167 & 232 $\pm$ 14 & 275 $\pm$ 28 & 0.504 $\pm$ 0.083 & 4 & 2016 $\pm$ 38 \\
6 & 542 & 624 & 12.89 & 213 & 181 $\pm$ 3 & 291 $\pm$ 20 & 0.102 $\pm$ 0.023 & 3 & 1726 $\pm$ 14 \\
7$*$ & 568 & 587 & 10.96 & 249 & 155 $\pm$ 9 & 274 $\pm$ 15 & 0.098 $\pm$ 0.023 & 3 & 2028 $\pm$ 16 \\
8$*$ & 655 & 456 & 29.28 & 312 & 99 $\pm$ 9 & 151 $\pm$ 20 & 0.207 $\pm$ 0.036 & 8 & 2010 $\pm$ 9 \\
9 & 695 & 717 & 19.42 & 80 & 87 $\pm$ 6 & 83 $\pm$ 4 & 0.697 $\pm$ 0.016 & 5 & 2104 $\pm$ 6 \\
10 & 569 & 719 & 17.28 & 149 & 197 $\pm$ 6 & 220 $\pm$ 9 & 0.602 $\pm$ 0.014 & 4 & 1910 $\pm$ 6 \\
\hline
\end{tabular}
\end{table}