\begin{table}%T2
\par
\caption{\label{tab2}Molecular constants for CH$_2$D$^+$ in the ground state (in MHz).}
\small%\centering
\par
\begin{tabular}{cccc}
\hline\hline\noalign{\smallskip}
\multicolumn{1}{c}{Constant}& \multicolumn{1}{c}{present\tablefootmark{a}}& \multicolumn{1}{c}{\cite{rosslein:ch2d+}} & \multicolumn{1}{c}{\cite{jagod:ch2d+}} \\
\hline
\par
  $A$            &   280~866.25(99)         &  280~866.9(51)        &  280~847.1(30)    \\
  $B$            &   173~019.332(70)        & 173~019.2(30)         &  173~012.3(24)    \\
  $C$            &   105~686.839(44)        &  105~687.0(15)        &  105~684.0(12)    \\ 
  $\Delta_{J}$   &   ~3.6289(33)           &  ~3.639(21)         &  ~3.592(15)      \\ 
  $\Delta_{JK}$  &   ~10.9520(105)         &  ~10.852(78)         &  ~10.673(60)     \\
  $\Delta_{K}$   &   ~8.043(52)            &  ~7.939(21)          &  ~7.825(60)      \\
  $\delta_{J}$   &   ~1.38955(165)         &  ~1.4000(90)         &  ~1.3730(60)     \\
  $\delta_{K}$   &   ~11.957(28)           &  ~11.845(57)         &  ~11.806(45)     \\
  $\Phi_{J}$     &   ~0.000089(33)         &                      &                  \\
  $\Phi_{KJ}$    &   ~0.00524(52)          &                      &                  \\
 \hline
\end{tabular}
\tablefoot{\tablefoottext{a}{The values in parentheses indicate one standard deviation from the  least-squares fit to the last quoted digits.} }
\end{table}