\begin{table}%t2
\par
 \caption{\label{tab2}Orbital parameters of the active Centaur P/2004 A1 (LONEOS).}
     %\centerline
{
\begin{tabular}{c c c c c c c}
     \hline\hline
      $a$ (AU)$^a$   & $q$ (AU)$^b$
      & {\it e}$^c$
     & $P$ (year)$^d$ & Peri ($^{\circ}$)$^e$
     & Node ($^{\circ}$)$^f$ & {\it i} ($^{\circ}$)$^g$ \\
     \hline
     7.896 & 5.463 & 0.308 & 22.2  & 20.49 & 125.3 & 10.6 \\
     \hline
     \end{tabular}}
\par
     \medskip{$^a$ Semimajor axis. $^b$ Perihelion distance. $^c$ Orbital eccentricity. $^d$ Orbital period. $^e$ The J2000 argument of perihelion. $^f$ The J2000 longitude of the ascending node. $^g$ Inclination.}
    \end{table}