\begin{table}%tC.1
\caption{\label{rclabel_hcg2b}HCG 2b rotation curve.}
%\centering
\par
\begin{tabular}{cccccccc}
\hline \hline \noalign{\medskip} 
           $r$  &  $\sigma_r$  &             $r$   &    $\sigma_r$  &          $v$   & $\sigma_v$   &            $N$   &              Side \\
(kpc) &(kpc) &(\arcsec) & (\arcsec)& (km~s$^{-1}$)& (km~s$^{-1}$)&bins \\ 
(1)&(2)&(3)&(4)&(5)&(6)&(7)&(8)\\
\hline
            0.12  &            0.07  &             0.4  &             0.2  &              49  &               3  &               4  &               a \\
            0.15  &            0.03  &             0.5  &             0.1  &             --26  &               1  &               3  &               r \\
            0.32  &            0.05  &             1.1  &             0.2  &              12  &               7  &               9  &               r \\
            0.32  &            0.05  &             1.1  &             0.2  &              50  &               5  &               9  &               a \\
            0.52  &            0.05  &             1.8  &             0.2  &              55  &               5  &              14  &               r \\
            0.52  &            0.05  &             1.8  &             0.2  &              64  &               5  &              14  &               a \\
            0.70  &            0.05  &             2.5  &             0.2  &              80  &               4  &              20  &               r \\
            0.70  &            0.05  &             2.5  &             0.2  &              84  &               5  &              20  &               a \\
            0.89  &            0.05  &             3.1  &             0.2  &              96  &               3  &              24  &               r \\
            0.89  &            0.05  &             3.1  &             0.2  &             103  &               6  &              24  &               a \\
            1.06  &            0.04  &             3.7  &             0.2  &             108  &               4  &              24  &               r \\
            1.06  &            0.04  &             3.7  &             0.2  &             105  &               6  &              24  &               a \\
            1.20  &            0.04  &             4.3  &             0.1  &             105  &               6  &              24  &               r \\
            1.20  &            0.04  &             4.3  &             0.1  &             107  &               6  &              24  &               a \\
            1.33  &            0.03  &             4.7  &             0.1  &             105  &               6  &              24  &               a \\
            1.33  &            0.04  &             4.7  &             0.1  &             109  &               6  &              24  &               r \\
            1.45  &            0.03  &             5.1  &             0.1  &             117  &               5  &              24  &               a \\
            1.49  &            0.05  &             5.3  &             0.2  &             118  &               6  &              24  &               r \\
            1.59  &            0.05  &             5.6  &             0.2  &             114  &               5  &              24  &               a \\
            1.75  &            0.15  &             6.2  &             0.5  &             118  &               8  &              21  &               r \\
            1.76  &            0.06  &             6.2  &             0.2  &             134  &               5  &              24  &               a \\
            1.96  &            0.09  &             7.0  &             0.3  &             123  &               8  &              20  &               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}