\begin{table}%t2
\caption{\label{Tab1}Differential rotation and break down times.}
%\centering
\par
\begin{tabular}{lcccc} 
\hline
\hline
Hemisphere & Latitude range& Number of groups &Angular velocity &$T_{\rm bd}$  \\
& (degrees) & & (deg/day) & (number of rotations) \\
\hline
North & 0.0--9.8 & 4013  & 14.460 &87.3\\
      & 9.9--14.4 & 4015  & 14.330 &78.3\\
      & 14.5--20.0 & 4048  & 14.263 &46.2\\
      & 20.1--60.0 & 3981  & 13.936 &4.0\\
South & 0.0--9.8 & 4060 &  14.496 &85.4\\
      & 9.9--14.4 & 3847 &  14.362 &81.6\\
      & 14.5--20.0 & 4143 &   14.310 &45.1\\
      & 20.1--60.0 & 3809 &  13.979 &4.2\\
\hline
\end{tabular}
\par
\end{table}