\begin{table}%t4
\caption {\label{tab:c2h10p}Observed hyperfine structure components of the $N'\rightarrow N=1\rightarrow0$ transition in \cch: 
  rest frequencies$^a$, residuals $\rm o-c$ between observed and calculated frequencies$^b$, 
  and relative intensities~$f$.} % title of Table 
%\centerline
 {
\begin{tabular}{c c c r c} 
\hline\hline % inserts double horizontal lines 
Comp. & Transition & $\nu$ & $\rm o-c$ &  $f$ \\ % table heading
No. & $J',F'\rightarrow J,F$ & [MHz] & [kHz] & \\  
\hline % inserts single horizontal line 
1 & $3/2,1\rightarrow1/2,1$ & 87284.105~(10) & $-$3 & 0.042\\
2 & $3/2,2\rightarrow1/2,1$ & 87316.898~(10) &    4 & 0.416\\
3 & $3/2,1\rightarrow1/2,0$ & 87328.585~(10) & $-$2 & 0.207\\
4 & $1/2,1\rightarrow1/2,1$ & 87401.989~(10) & $-$3 & 0.208\\
5 & $1/2,0\rightarrow1/2,1$ & 87407.165~(10) &    8 & 0.084\\
6 & $1/2,1\rightarrow1/2,0$ & 87446.470~(10) &    0 & 0.043\\
\hline %inserts single line 
\end{tabular}}
\par
\smallskip
$^a$ Numbers in parentheses are one standard deviation in units of the least significant figures.\\
$^b$ Calculated from present set of spectroscopic parameters in Table~\ref{CCH_parameters}.
\end{table}