\begin{table*}%t4
%\centering
\par
  \caption{Spectroscopic constants determined for the ($v_{10}=1,~v_{11}=1$) and
             ($v_{10}=1,~v_{11}=2$) bending combination states of HC$_5$N.
             Standard errors in units of the last digit are given in parentheses for the
             fitted parameters.  \label{tab:comb}}
$$
  \begin{tabular}{lcD{.}{.}{8}D{.}{.}{8}}
    \hline\hline  \\[-1ex]%[-3ex]
                &               & \multicolumn{1}{c}{($v_{10}=1,~v_{11}=1$)} &
                                  \multicolumn{1}{c}{($v_{10}=1,~v_{11}=2$)} \\[1ex]
    \hline  \\[-1ex]%[-3ex]
    $B$              &  (MHz)  &  1336.579275(24)   &  1339.381182(21)   \\%[-1ex]
    $D$              &  (Hz)   &    32.3182(24)     &    33.8929(22)     \\%[-1ex]
    $H$              &($\mu$Hz)&     1.635^a        &     1.635^a        \\%[-1ex]
    $d_{JL(11,11)}$  &  (kHz)  &     -3.3047^a       &     -3.3316^a       \\%[-1ex]
    $d_{JL(10,11)}$  &  (kHz)  &     3.467(44)      &     3.745(13)      \\%[-1ex]
    $q_{10}$         &  (MHz)  &     0.50272(25)    &     0.50614(12)    \\%[-1ex]
    $q_{10J}$        &  (Hz)   &     -0.1734^a       &     -0.197(12)      \\%[-1ex]
    $q_{11}$         &  (MHz)  &     1.16704(34)    &     1.17182(13)    \\%[-1ex]
    $q_{11J}$        &  (Hz)   &     -1.0629^a       &    -1.0714(60)     \\%[-1ex]
    $q_{10,11,11}$   &  (kHz)  &                    &     0.658(19)      \\%[-1ex]
    $x_{L(11,11)}$   &  (GHz)  &                    &     6.3053(14)     \\%[-1ex]
    $x_{L(10,11)}$   &  (GHz)  &     7.3519(38)     &     7.34388(83)    \\%[-1ex]
    $r_{10,11}$      &  (GHz)  &    -4.7974(52)     &     -4.7494(11)     \\%[-1ex]
    $r_{10,11,J}$    &  (kHz)  &    -1.301(21)      &     -1.174(30)      \\%[-1ex]
    $\sigma_{\rm fit}$   &  (kHz)  &    10.1            &    10.6            \\%[-1ex]
    No. of lines     &         &      84            &      130           \\%[-1ex]
    $J$ range        &         &  \multicolumn{1}{c}{11--85}  &
                                  \multicolumn{1}{c}{10--85} \\[1ex]
    \hline 
  \end{tabular}
  $$
  \begin{list}{}{}
    \item[$^a$] Fixed in the analysis.
  \end{list}
\end{table*}