\begin{table}%T11
\caption[]{\label{tab:lhp}Mixing-length parameters ($l/H_{\rm p}$) for the binary components 
(Table~\ref{tab:systems})
calculated from the temperature-gravity fitting function by Ludwig et al. 
(\cite{hgl99}) and the mass fitting formula by Yildiz et al. (\cite{yildiz06}).
}
 {
\begin{tabular}{lcccc} 
\hline
\hline\noalign{\smallskip}
  & \multicolumn{2}{c} {Ludwig et al.} & \multicolumn{2}{c} {Yildiz et al.} \\
             & Pri. &   Sec.  &   Pri. &  Sec.\\
\hline\noalign{\smallskip}
Sun$^a$
& \multicolumn{2}{c} {1.59} & \multicolumn{2}{c} {1.91} \\
\hline\noalign{\smallskip}
Group 1:     &      &         &        &      \\
CG\,Cyg      & 1.61 &   1.68  &   1.79 &  1.33 \\
CV\,Boo      & 1.58 &   1.59  &   1.96 &  1.85 \\
V636\,Cen    & 1.58 &   1.63  &   1.99 &  1.54 \\
ZZ\,UMa      & 1.55 &   1.61  &   2.11 &  1.86 \\
FL\,Lyr      & 1.54 &   1.61  &   2.19 &  1.83 \\ %(1.30 1.05)
V1061\,Cyg   & 1.51 &   1.61  &   2.25 &  1.77 \\
\hline\noalign{\smallskip}
Group 2:     &      &         &        &      \\
HS\,Aur      & 1.61 &   1.62  &   1.69 &  1.63 \\
RW\,Lac      & 1.58 &   1.60  &   1.76 &  1.60 \\
$\alpha$\,Cen& 1.58 &   1.61  &   2.06 &  1.78 \\ %(1.64 2.10)
V568\,Lyr    & 1.59 &   1.64  &   2.02 &  1.42 \\
\hline\noalign{\smallskip}
Exception:   &      &         &        &      \\
VZ\,Cep      & 1.39 &   1.59  &   2.34 &  2.07 \\
\hline
\end{tabular}}
\smallskip
{$^a$ For comparison, the values calculated for the Sun are included.}
\end{table}