\begin{table}%t1
%\centering
\par
\caption{The observational log. There are runs from two
observatories: Brno (B), Wise Observatory (WO). HJD is --2~451~000 days, $t$ is the duration of the observation in hours and~$N$ is number of frames.\label{tab1}}
\begin{tabular}{rcccrcccc}
\hline
\hline
 Obs. & Date & HJD (start) & $t$ [h] & $N$ \\
\hline
 B & 20.7.1999 & 380.3999 & 1.96 & 191 \\
 B & 21.7.1999 & 381.3984 & 3.96 & 368 \\
 B & 23.7.1999 & 383.3478 & 5.79 & 552 \\
 B & 25.7.1999 & 385.3422 & 5.68 & 586 \\
 B & 26.7.1999 & 386.4170 & 3.17 & 327 \\
 B & 27.7.1999 & 387.3247 & 6.56 & 613 \\
 B & 28.7.1999 & 388.3362 & 6.32 & 579 \\
 B & 29.7.1999 & 389.3144 & 6.49 & 826 \\
 B & 30.7.1999 & 390.3406 & 4.33 & 306 \\
 B & 31.7.1999 & 391.3613 & 0.41 & 39 \\
 WO & 01.8.1999 & 392.4814 & 2.18 & 171 \\
 B & 22.8.1999 & 413.3265 & 2.58 & 192 \\
\hline
\end{tabular}
\end{table}