\begin{table}%t1
\caption{\label{tab_ OBasso}Characteristics of the Cygnus OB associations and stellar clusters collectively referred to as the Cygnus complex \citep[from][]{Knodlseder:2002}.}
\par
%\centering
\par
\small\begin{tabular}{cccc}
\hline\hline\noalign{\smallskip}
 Name & Observed population & Distance (pc) & Age (Myr)\\
\hline
 Cyg OB1 & 23 $\in$ [15, 40~$M_{\odot}$] & 1905 & 4 \\
 Cyg OB2 & 120 $\in$ [20, 120~$M_{\odot}$] & 1584 & 2.5 \\
Cyg OB3 & 14 $\in$ [25, 60~$M_{\odot}$] & 2187 & 3.5 \\
Cyg OB7 & 10 $\in$ [7, 25~$M_{\odot}$] & 832 & 3.5 \\
Cyg OB8 & 6 $\in$ [20, 40~$M_{\odot}$] & 2399 & 7.5 \\
 Cyg OB9 & 8 $\in$ [20, 40~$M_{\odot}$] & 1259 & 3.5 \\
 Ber 86 & 11 $\in$ [7, 25~$M_{\odot}$] & 1660 & 4 \\
 Ber 87 & 24 $\in$ [7, 25~$M_{\odot}$] & 1905 & 4.5 \\
NGC 6871 & 13 $\in$ [7, 25~$M_{\odot}$] & 2399 & 5.5 \\
 NGC 6913 & 13 $\in$ [7, 40~$M_{\odot}$] & 1820 & 3.5 \\
NGC 6910 & 7 $\in$ [7, 25~$M_{\odot}$] & 1820 & 4.5 \\
NGC 6883 & 2 $\in$ [12, 15~$M_{\odot}$] & 1820 & 15 \\
IC 4996 & 6 $\in$ [6, 25~$M_{\odot}$] & 1660 & 5.5 \\
\hline
\end{tabular}\vspace*{5mm}
\end{table}