\begin{table}%t1
\caption{23 published open clusters with $\Delta a$ CCD photometry
taken from Bayer et~al. (\cite{Bay00}), 
Maitzen et~al. (\cite{Mai01}), Paunzen \& Maitzen (\cite{Pau01}, \cite{Pau02}) and Paunzen et~al. (\cite{Paun02}, \cite{Pau03}). 
The
values for the reddening, age and distance modulus are from the same sources. 
The metallicity for all clusters is (within the errors) solar according to
WEBDA and Lyng\aa\ (\cite{Lyn87}).}
\label{ucl}
%\centering
\par
\begin{tabular}{ccclc|ccclc}
\hline
\hline
Cluster & log~$t$ & $m_V - M_V$ & \multicolumn{1}{c}{$E$($B-V$)} & $N_{{\rm stars}}$ &
Cluster & log~$t$ & $m_V - M_V$ & \multicolumn{1}{c}{$E$($B-V$)} & $N_{{\rm stars}}$ \\
\hline
Collinder 272 & 7.20 & 13.06 & 0.47 & 111 & NGC 6134 & 8.97 & 11.07 & 0.40 & 102 \\
Lyng{\aa}~ 14 & 6.71 & 14.29 & 1.48 (var) & 53 & NGC 6192 & 7.95 & 13.00 & 0.68 & 98 \\
Melotte 105 & 8.30 & 12.70 & 0.36 & 114 & NGC 6204 & 7.60 & 11.50 & 0.43 & 319 \\
NGC 2099 & 8.50 & 11.67 & 0.30 & 41 & NGC 6208 & 9.00 & 10.54 & 0.18 & 41 \\
NGC 2169 & 7.70 & 10.57 & 0.12 & 13 & NGC 6250 & 6.50 & 11.18 & 0.38 & 48 \\
NGC 2439 & 7.20 & 14.23 & 0.41 & 113 & NGC 6396 & 7.20 & 13.34 & 0.96 (var) & 105 \\
NGC 2489 & 8.45 & 12.00 & 0.40 & 59 & NGC 6451 & 8.13 & 13.74 & 0.67 & 146 \\
NGC 2567 & 8.43 & 11.40 & 0.13 & 50 & NGC 6611 & 6.90 & 13.72 & 0.86 (var)& 79\\
NGC 2658 & 9.10 & 11.67 & 0.04 & 55 & NGC 6705 & 8.30 & 12.73 & 0.43 & 312 \\
NGC 3114 & 8.10 & 10.02 & 0.07 & 271 & NGC 6756 & 8.10 & 14.67 & 0.80 & 65 \\
NGC 3960 & 8.80 & 12.74 & 0.30 & 93 & Pismis 20 & 6.60 & 15.30 & 1.24 (var)& 238 \\
NGC 5281 & 7.10 & 11.35 & 0.26 & 30 \\
\hline
\end{tabular}
\end{table}