\begin{table}%t5
%\centering
\par
\caption{Comparison between the observed periods 
of PG~0122+200 (taken from Vauclair et~al. \cite{Vauclair01}) and the
theoretical ($\ell=1$) periods of the best-fit model 
($\overline{\delta \Pi}= 2.61$~s, $\sigma_{\delta \Pi}= 3.55$~s).\label{tab5}}
\small
\begin{tabular}{cccrr}
\hline
\hline
\noalign{\smallskip}
$\Pi_i^{\rm O}$ & $\Pi_k^{\rm T}$ & $k$ & $\delta \Pi_i$ & 
$\delta \Pi_i/ \Pi_i$\\
 $[$s$]$ & $[$s$]$ & & $[$s$]$  & $[\%]$ \\
\hline
$336.67$ & $340.30$ & 14 & $-3.63$  & $-1.08$   \\
--      & $360.88$ & 15 & -- & --  \\
$379.60$ & $381.16$ & 16 & $-1.56$  & $-0.41$   \\
$401.00$  & $401.75$ & 17 & $-0.75$  & $-0.19$   \\
--      & $424.05$ & 18 & -- & --  \\
$449.43$ & $442.62$ & 19 & $6.81$  & $1.51$   \\
$468.69$ & $463.65$ & 20 & $5.04$  & $1.08$  \\
--      & $485.45$ & 21 & -- & --  \\
--      & $506.63$ & 22 & -- & --  \\
--      & $527.22$ & 23 & -- & --  \\
--      & $546.99$ & 24 & -- & --  \\
$570.00$ & $570.35$ & 25 & $-0.35$  & $-0.06$   \\
--      & $591.06$ & 26 & -- & --  \\
$611.05$ & $611.24$ & 27 & $-0.19$  & $-0.03$   \\
\hline
\end{tabular}
\end{table}