\begin{table}%t4
\caption{Comparison of the orbital elements of C/2002 R5 (SOHO) with a initial periodicity of $P = 3.90~{\rm yr}$ to C/1999 R1 = C/2003 R5 (SOHO) at around the assumed separation time in the late 19th~\mbox{century.}}\label{tab21}
%\centering
\par
\begin{tabular}{l c c c}
\hline\hline
& C/1999 R1 = C/2003 R5 & & C/2002 R5 (SOHO) \\ \cline{2-2} \cline{4-4}
$q$ [AU] & 0.060 & & 0.060 $\pm$ 0.006 \\
$e$ & 0.976 & & 0.976 $\pm$ 0.002\\
$a$ [AU] & 2.52 & & 2.51 $\pm$ 0.25\\
$\omega$ [deg] & 30.3 & & 34.6 $\pm$ 3.0 \\
$\Omega$ [deg] & 18.3 & & 24.2 $\pm$ 3.2 \\
$i$ [deg] & 18.8 & & 17.4 $\pm$ 1.1 \\ \hline
\end{tabular}
\end{table}