\begin{table}%t2
\caption{\label{obscom}Observed comets.}
\small%\centerline
 {
\begin{tabular}{lllllllllll} 
\hline \hline 
Comet & $T_{\rm P}$  & $e$ &$a$           & $q$&Aph&$i$ & $P$ & $T_{\rm J}$ & \multicolumn{2}{c}{Type}\\
 &(yyyy-mm-dd)& &(AU) &(AU) &(AU) &(\degr) &(yr) & &L&H\\
\hline 
122P/de Vico$^a$ & 1995-10-06 &  0.96271 & 17.7 & 0.66 & 34.7 & 85 & 74.3 & 0.37 & HF & SP$_{\rm I}$ \\
C/1996 B2 (Hyakutake)& 1996-05-01 & 0.99990 & 2296 & 0.23 & 4591 & 125 & 110000   & -0.34 & EXT & L \\
C/1995 O1 (Hale-Bopp)$^{b,c}$ & 1997-04-01 & 0.99509 & 186.0 & 0.91 & 371.1 & 89 & 2537 & 0.04 & EXT & I \\
55P/Tempel-Tuttle & 1998-02-28 &   0.90555 & 10.3 & 0.98 & 19.7 & 162 & 33.2 & -0.64 & HF & SP$_{\rm I}$ \\
C/1999 H1 (Lee) & 1999-07-11 & 0.99974 & 2773   & 0.71 & 5545 & 149 & 146000   & -0.90 & EXT & L \\
C/1999 S4 (LINEAR)$^d$  & 2000-07-26 & 1.00010 & --  & 0.77 & --     & 149 & --    & --    & NEW & L \\
C/1999 T1 (McNaught-Hartley) & 2000-12-13 & 0.99986 & 8502   & 1.17 & 17000   & 80 & 780000   & 0.23 & EXT & L \\
C/2001 A2 (LINEAR) & 2001-05-25 & 0.99969 & 2530   & 0.78 & 5060   & 36 & 127000   & 0.88 & EXT & L \\
C/2000 WM1 (LINEAR)$^b$ & 2002-01-23 & 1.00025 & --       & 0.56 & --       & 73 & --      & --   & NEW & L \\
153P/Ikeya-Zhang$^a$ & 2002-03-19 &   0.99010 & 51.2 & 0.51 & 101.9 & 28 & 366.5 & 0.88 & EXT & IP \\
C/2002 X5 (Kudo-Fujikawa) & 2003-01-29 & 0.99984 & 1175   & 0.19 & 2350   & 94 & 40300   & -0.03 & EXT & L \\
C/2002 V1 (NEAT) & 2003-02-18 & 0.99990 & 1010   & 0.10 & 2021   & 82 & 32100   & 0.06 & EXT & L \\
C/2002 Y1 (Juels-Holvorcem) & 2003-04-13 & 0.99715 & 250.6 & 0.71 & 500.5 & 104 & 3967   & -0.23 & EXT & I \\
88P/Howell$^d$ & 2004-04-13 &   0.56124 & 3.1 & 1.37 & 4.9 & 4 & 5.5 & 2.95 & JF & SP$_{\rm IV}$ \\
C/2002 T7 (LINEAR) & 2004-04-23 & 1.00048 & --    & 0.61 & --       & 161 & --      & --    & NEW & L \\
C/2001 Q4 (NEAT)$^c$& 2004-05-16 & 1.00069 & --  & 0.96 & --       & 100 & --      & --    & NEW & L \\
C/2003 K4 (LINEAR)$^c$ & 2004-10-14 & 1.00030 & --  & 1.02 & --   & 134 & --      & --    & NEW & L \\
9P/Tempel 1$^e$ & 2005-07-05 &  0.51749 & 3.1 & 1.51 & 4.7 & 11 & 5.5 & 2.97 & JF & SP$_{\rm IV}$ \\
73P-B/Schwassmann-Wachmann 3$^f$ & 2006-06-08 &  0.69350 & 3.1 & 0.94 & 5.2 & 11 & 5.4 & 2.78 & JF & SP$_{\rm III}$ \\
73P-C/Schwassmann-Wachmann 3$^f$& 2006-06-07 &  0.69338 & 3.1 & 0.94 & 5.2 & 11 & 5.4 & 2.78 & JF & SP$_{\rm III}$ \\
C/2006 M4 (SWAN) & 2006-09-29 & 1.00018 & --       & 0.78 & --       & 112 & --      & --    & NEW & L \\
17P/Holmes$^g$& 2007-05-04& 0.43242 & 3.6 & 2.05 & 5.18 & 19 & 6.9 &  2.86   & JF  & SP$_{\rm IV}$ \\
8P/Tuttle$^h$& 2008-01-27 & 0.8198 & 5.7 & 1.03 & 10.4 & 55 & 13.6    &  1.60   & HF  &SP$_{\rm I}$ \\
C/2007 N3 (Lulin)&2009-01-10 & 1.00004& -- & 1.21&--&178&--&--& NEW&L\\
\hline 
\end{tabular}}
\medskip
$^a$ Jehin et~al. (\cite{jehin}) --
$^b$ Arpigny et~al. (\cite{arpi}, \cite{arpib}) --
$^c$ Manfroid et~al. (\cite{manfroid}) --
$^d$ Hutsem\'ekers et~al. (\cite{hutsemekers}) -- 
$^e$ Jehin et~al. (\cite{jehina}) --
$^f$ Jehin et~al. (\cite{jehinb}) --
$^g$ \mbox{Bockel\'ee-Morvan} et~al. (\cite{bockelee}) --
$^h$ \mbox{Bockel\'ee-Morvan} et~al. (\cite{bockeleeb}). \\
The elements are obtained from the JPL Solar System Dynamics website. $T_{\rm P}$~is the epoch of the perihelion, $e$~the eccentricity, $q$~the perihelion distance in~AU, Aph the aphelion distance, $i$~the inclination on the ecliptic, $P$~the period, $T_{\rm J}$~the Tisserand parameter relative to Jupiter, the last columns give the classification according to Levison (\cite{levison}) and Horner et~al. (\cite{horner}). The subdivision~I$-$IV based on $T_{\rm J}$ is given for the SP~comets only,
all others being of the sub-type~I. 
\end{table}