\begin{table}%t3
\caption{\label{Tab:besfit_param}Best-fit parameters of the bow shock modeling of the knots~NK1 and~SK1.}
%\centering
\small
\begin{tabular}{lccccc}
\hline\hline
Parameter                       			& \multicolumn{2}{c}{NK1} 		& &	\multicolumn{2}{c}{SK1} 	 \\
\cline{2-3} \cline{5-6} \\
model                       				& 	A		&  	B 	                   & &     A              &  B           \\
                             				& 	w/o rot	&  w/ rot			& &	w/o rot	&  w/ rot	 \\
\hline
$\theta$ ($^\circ$)      			&   	83		&	82			& &	93		&   	92	\\
$V_{{\rm b}}$ (km~s$^{-1}$)	&   	55		&	55    			& &	31		&   	31	\\
$V_{{\rm ps}}$ (km~s$^{-1}$)	&   	55		&	50    			& &	25		&   	40	\\
$V_{{\rm rot}}$ (km~s$^{-1}$)	&   			&	2.0    		& &			&   	1.0	\\
p							&   	1.6		&	1.7  			& &	1.8		&   	1.8	\\
s							&   	1.7		&	1.7 			& &	1.9		&   	1.9	\\
$\chi_r^2$					&   	28.7		&	 28.2  	 	& &	146.7	&   	146.6 \\
\hline
\end{tabular}
\end{table}