\begin{table}%T2
\caption{\label{valueF}Average $F$ for each meteor shower.}
%\centering
\par
\begin{tabular}{ll}
\hline\hline
Shower &~$\overline{F}$  \\
\hline
Leonids 2000 & 0.498~$\pm$ 0.014\\
Taurids & 0.535~$\pm$ 0.025\\
Perseids & 0.535~$\pm$ 0.010\\
Orionids & 0.545~$\pm$ 0.012\\
Geminids & 0.583~$\pm$ 0.016\\
\hline
\end{tabular}
\end{table}