\begin{table}%t1
\par
\caption{\label{tab1}Active Centaurs (as of January 2009).}
%\centerline
{
\begin{tabular}{c c c c c c c}
     \hline\hline
         & $q$ (AU)$^a$  & {\it e}$^b$
     & {\it i} ($^{\circ}$)$^c$ & $P$ (year)$^d$ & TJ$^e$    & $^f$ \\
     \hline
     29P/S-W 1 & 5.724 & 0.044 & 9.4  & 14.7 & 2.984 &           \\
     39P/Oterma$^g$ & 5.471  & 0.245 & 1.9 & 19.5 & 3.005 & \\
     (2060) Chiron & 8.454  & 0.383 & 6.9 & 50.7 & 3.356 & 95P/Chiron \\
     165P/LINEAR & 6.830  & 0.621 & 15.9 & 76.4 & 3.095 & C/2000 B4 \\
     166P/NEAT & 8.564  & 0.384 & 15.4 & 51.9 & 3.285 & C/2001 T4 \\
     167P/CINEOS & 11.788 & 0.269 & 19.1 & 64.8 & 3.527 & C/2004 PY42 \\
     174P/Echeclus & 5.826 & 0.457 & 4.3 & 35.1 & 3.032 & (60558)/P/2000 EC98\\
     C/2001 M10 (NEAT)$^h$
     & 5.303  & 0.801 & 28.1 & 138 & 2.586 & \\
     P/2004 A1 (LONEOS) & 5.463  & 0.308 & 10.6 & 22.2 & 2.963 &\\
     P/2005 S2 (Skiff) & 6.398 & 0.197 & 3.1 & 22.5 & 3.076 & \\
     P/2005 T3 (Read) & 6.202 & 0.174 & 6.3 & 20.6 & 3.045 & \\
     P/2007 S2 (Lemmon) & 5.549 & 0.555 & 16.9 & 44.1 & 2.882 & \\
     \hline
     \end{tabular}}
\par
     \medskip{$^a$ Perihelion distance. $^b$ Eccentricity. $^c$ Inclination. $^d$ Period. $^e$ Tisserand
     parameter. $^f$ Former or alternative designation. $^g$ Presently inactive.\\ $^h$ Activity questioned.}
\end{table}