\begin{table}%T4
\caption{\label{smernice}Slope of the line~$k$ fitted through the beginning heights of shower
meteors, the correlation coefficient~$c_{\rm cor}$ and the relative error of this fit.}
%\centering
\par
\begin{tabular}{llll}
\hline\hline
Shower &~$k \pm \Delta k$ &~$c_{\rm cor}$ & Rel. error \\
\hline
Leonids & 9.9~$\pm$ 1.5 & 0.88 & 15\% \\
Perseids & 7.9~$\pm$ 1.3 & 0.92 & 16\% \\
Taurids & 6.2~$\pm$ 2.2 & 0.66 & 36\% \\
Orionids & 5.02~$\pm$ 0.65 & 0.86 & 13\% \\
Geminids & 0.46~$\pm$ 0.26 & 0.35 & 56\% \\
\hline
\end{tabular}
\end{table}