\begin{table}%t1
\caption{\label{tab1}Approximate values of ellipticity derived for the STEREO loops observed by \cite{ASCetal2008b}.} 
%\centering
\small
 \begin{tabular}{ l  c  c  c  c    }
\hline
\hline
& Curvature  & \multicolumn{2}{ c }{Circularity ratio} & Ellipticity \\
& radius (Mm) &	      &\\
loop number & $r_{\rm curv}$ & $C_{\rm min}$ & $C_{\rm max}$ & $\epsilon$ \\
\hline
1 & 17.0 & 0.92 & 1.11 & 0.56  \\
2 & 19.4 & 0.97 & 1.19 & 0.58  \\
3 & 30.5 & 0.90 & 1.12 & 0.60  \\
4 & 30.9 & 0.96 & 1.11 & 0.50  \\
5 & 30.6 & 0.78 & 1.20 & 0.76  \\
6 & 38.3 & 0.96 & 1.12 & 0.52  \\
7 & 50.2 & 0.87 & 1.30 & 0.74  \\
\hline
\end{tabular}
\end{table}