\begin{table}%t3
%\centering
\par
\caption {\label{orbit2}Orbital and physical parameters of the 3-planet system orbiting HD~181~433.}                  
\begin{tabular}{l c c c}       
\hline\hline                 
Parameters & HD~181~433b & HD~181~433c & HD~181~433d \\   
\hline      
$P$ [days]           		& 9.3743~$\pm$~0.0019 	& 962.0~$\pm$~15 		& 2172~$\pm$~158    \\
$T_{\rm peri}$ [BJD-2400000]    & 54~542.0~$\pm$~0.26 	& 53~235.0~$\pm$~7.3	& 52~154~$\pm$~194 \\
$e$                 		& 0.396~$\pm$~0.062	& 0.28~$\pm$~0.02		& 0.48~$\pm$~0.05 \\
$\omega$ [deg]       		& 202~$\pm$~10 		& 21.4~$\pm$~3.2 		& --30~$\pm$~13 \\
$V$ [\kms]          & \multicolumn{3}{c}{40.2125~$\pm$~0.0004} \\
$K$ [\ms]          		&  2.94~$\pm$~0.23 	& 16.2~$\pm$~0.4		& 11.3~$\pm$~0.9 \\
m{\sini} [$M_{\rm JUP}$]      	& 0.024 		& 0.64 			& 0.54 \\
m{\sini} [$M_{\oplus}$]         & 7.5 			& 203 			& 171  \\
$a$ [AU]                        & 0.080 		& 1.76 			& 3 \\
\hline   
$N_{\rm meas}$          & \multicolumn{3}{c}{107} \\
Data span [days]           & \multicolumn{3}{c}{1757} \\
$\sigma$ ($\rm O-C$) [\ms]    & \multicolumn{3}{c}{1.06} \\
$\chi^2_{\rm red}$      & \multicolumn{3}{c}{1.29} \\				   
\hline
\end{tabular}
\end{table}