\begin{table}%t1
%\centering
\par
\caption{We list the position angle (PA), inclination ($i$), distance ($D$), spatial scale, coordinates of the dynamical center derived from CO and/or from the locus of the radio continuum source [(RA$_{2000}$, Dec$_{2000}$); accurate to $\sim$0.5$^{\prime\prime}$ on average] and systemic velocity($v_{\rm sys}^{\rm LSR}$) derived from CO for NGC~4321, NGC~4826, NGC~4579 and NGC~6951 used in this paper. The spatial resolutions of the CO observations are listed in Cols.~9, 10.
\label{parameters}}
\begin{tabular}{lccccccccc}
\hline\hline
\multicolumn{1}{l}{Galaxy} &
\multicolumn{1}{c}{PA($^{\circ}$)} &
\multicolumn{1}{c}{$i$($^{\circ}$)} &
\multicolumn{1}{c}{$D$~(Mpc)} &
\multicolumn{1}{c}{Scale~(pc/$^{\prime\prime}$)} & 
\multicolumn{1}{c}{RA$_{2000}$} & 
\multicolumn{1}{c}{Dec$_{2000}$} & 
\multicolumn{1}{c}{$v_{\rm sys}^{\rm LSR}$(km~s$^{-1}$)} & 
\multicolumn{1}{c}{CO(1--0)($^{\prime\prime} \times ^{\prime\prime}$)} &
\multicolumn{1}{c}{CO(2--1)($^{\prime\prime} \times ^{\prime\prime}$)} \\
\hline 
{NGC~4321} & 153 & 32 & 16.8 & 83 & 12$^{\rm h}$22$^{\rm m}$54.91$^{\rm s}$ &	$15\degr49^{\prime}19.9^{\prime\prime}$ & 1573~$\pm$~10  & 2.2~$\times$~1.2 & -- \\
{NGC~4826} & 112 & 54 & 4.1 & 20 & 	 12$^{\rm h}$56$^{\rm m}$43.63$^{\rm s}$	& $21\degr40^{\prime}59.1^{\prime\prime}$	& 413~$\pm$~10  & 2.5~$\times$~1.8 & 0.7~$\times$~0.5 \\
{NGC~4579} & 95 & 36 & 19.8 & 97 & 	12$^{\rm h}$37$^{\rm m}$43.52$^{\rm s}$	& $11\degr49^{\prime}05.5^{\prime\prime}$	& 1469~$\pm$~10	& 2.0~$\times$~1.3 & 1.0~$\times$~0.6 \\
{NGC~6951} & 134 & 42 & 19 & 93 & 	20$^{\rm h}$37$^{\rm m}$14.12$^{\rm s}$	& $66\degr06^{\prime}20.0^{\prime\prime}$	& 1441~$\pm$~10	& 1.4~$\times$~1.1 & 0.6~$\times$~0.5 \\
\hline
\end{tabular}
\end{table}