\begin{table}%tC.10
\caption{\label{rclabel_hcg56a}HCG 56a rotation curve.}
\par
%\centering
\par
\begin{tabular}{cccccccc}
\hline \hline \noalign{\smallskip}
           $r$   &  $\sigma_r$   &             $r$   &    $\sigma_r$   &          $v$   & $\sigma_v$   &            $N$  &              Side \\
(kpc) & (kpc) &(\arcsec) &(\arcsec) & (km~s$^{-1}$)& (km~s$^{-1}$) & bins\\
(1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)\\
\hline
            1.89  &            0.08  &             3.5  &             0.1  &              21  &               6  &               2  &               r \\
            2.09  &            0.00  &             3.8  &             0.0  &              60  &               7  &               1  &               a \\
            2.23  &            0.00  &             4.1  &             0.0  &              51  &               7  &               1  &               r \\
            2.71  &            0.13  &             5.0  &             0.2  &              70  &               0  &               2  &               r \\
            2.99  &            0.00  &             5.5  &             0.0  &              96  &               7  &               1  &               a \\
            3.13  &            0.00  &             5.7  &             0.0  &             120  &               7  &               1  &               a \\
            3.39  &            0.05  &             6.2  &             0.1  &             113  &               6  &               2  &               r \\
            4.71  &            0.82  &             8.6  &             1.5  &             130  &               7  &              22  &               a \\
            4.71  &            0.77  &             8.6  &             1.4  &             138  &               5  &              22  &               r \\
            7.26  &            0.66  &            13.3  &             1.2  &             190  &               3  &              22  &               a \\
            8.25  &            1.62  &            15.1  &             3.0  &             186  &               4  &              22  &               r \\
           10.54  &            1.27  &            19.3  &             2.3  &             203  &               3  &              22  &               a \\
           15.98  &            2.76  &            29.2  &             5.0  &             200  &               4  &              17  &               a \\
\hline
\end{tabular}
\tablefoot {(1), (3) Galactic radius. (2), (4) Dispersion around the galactic radius. (5) Rotation velocity. (6) Dispersion on the rotation velocity. (7)~Number of velocity bins. (8) Receding -- r -- or approaching -- a -- side.}
\end{table}