\begin{table}%t1
%\centering
\par
\caption{\label{Tab_1}Basic properties of NGC~2685.}
\small \begin{tabular}{llrr}
\hline \hline
Description & Parameter name    &    & Reference                         \\
\hline
Classification of galaxy                                                                   & Type                                          &    SB0+                      &  \cite{Vaucouleurs91}        \\
Right Ascension (J2000) (NED)                                                              & RA                                            & $ \hmsm{08}{55}{34}{75}      $ &  NED                            \\
Declination (J2000) (NED)                                                                  & Dec                                           & $ \dmsm{+58}{44}{03}{9}      $ &  NED                            \\
Optical heliocentric systemic velocity ($\rm km~{\rm s}^{-1}$)                            & $V_{\rm sys}$                                 & $     875.2   ~\pm~  2.0   $ &  this work                      \\
Distance of object ($\rm Mpc$)                                                             & $D$                                       & $      15.2   ~\pm~  3.8   $ & this work \\
Scale between distance on sky and true distance (${\rm pc}/~^{\prime\prime}$)            & $sc$                                   & $      74     ~\pm~ 19     $ & this work                       \\
Apparent $B$-band magnitude ($\rm mag$) & $m_{\rm B}$                                   & $      12.05  ~\pm~  0.15  $ & LEDA \citep[][]{LEDA}           \\
Apparent $I$-band magnitude ($\rm mag$)                                                     & $m_{\rm I}$                                   & $       9.90  ~\pm~  0.10  $ & LEDA \citep[][]{LEDA}           \\
Extinction-corrected apparent $B$-band magnitude ($\rm mag$)                                & $m_{\rm B}^{\rm c}$                           & $      11.77  ~\pm~  0.15  $ & NED                             \\
Extinction-corrected apparent $I$-band magnitude ($\rm mag$)                                & $m_{\rm I}^{\rm c}$                           & $       9.54  ~\pm~  0.12  $ & this work                       \\
Absolute $B$-band magnitude ($\rm mag$)                                                     & $M_{\rm B}$                                   & $     -19.1   ~\pm~  0.7   $ & this work                       \\
Absolute $I$-band magnitude ($\rm mag$)                                                     & $M_{\rm I}$                                   & $     -21.4   ~\pm~  0.6   $ & this work                       \\
$B$-band luminosity ($ 10^9~ {L}_\odot $) & $L_{\rm B}$                                   & $       7.0   ~\pm~  3.7   $ & this work                       \\
$I$-band luminosity ($ 10^9~ {L}_\odot $)                                                  & $L_{\rm I}$                                   & $      15.2   ~\pm~  7.7   $ & this work                       \\
Total {\ion{H}{i}} flux (${\rm Jy}~{\rm km}~{\rm s}^{-1}$) & $F_{\rm {\ion{H}{i}}}$      & $      31.4   ~\pm~  3.1   $ & this work                       \\
{\ion{H}{i}} mass ($10^9~{M}_\odot$) & $M_{\rm {\ion{H}{i}}}$                        & $       1.7   ~\pm~  0.9   $ & this work                       \\
$B$-band optical radius ($~^{\prime\prime}$) & $r_{25}$                                      & $     147     ~\pm~ 30     $ & LEDA \citep[][]{LEDA}           \\
{\ion{H}{i}} radius ($~^{\prime\prime}$)   & $r_{\rm {\ion{H}{i}}}$                        & $     200     ~\pm~ 40     $ & this work                       \\
Terminal radius ($~^{\prime\prime}$) & $r_{\rm t}$                                   & $     420     ~\pm~ 30     $ & this work                       \\
$B$-band optical radius ($\rm kpc$)  & $R_{25}$                                      & $      10.8   ~\pm~  2.7   $ & this work                       \\ 
{\ion{H}{i}} radius ($\rm kpc$)  & $R_{\rm {\ion{H}{i}}}$                        & $      14.8   ~\pm~  3.7   $ & this work                       \\
Terminal radius ($\rm kpc$)  & $R_{\rm t}$                   & $      31.0   ~\pm~  7.7   $ & this work                       \\
Rotation velocity at terminal radius (${\rm km}~{\rm s}^{-1}$)  & $V_{\rm t}$           & $147     ~\pm~ 15     $ & this work       \\
Rotation period at terminal radius (${\rm Gyr}$)  & $t_{\rm t}$                                   & $       1.297 ~\pm~  0.030 $ & this work                       \\
Dynamical mass ($10^9~{M}_\odot$)& $M_{\rm dyn}$                                 & $ >$$155    \pm 50 $ & this work                       \\
Ratio of {\ion{H}{i}} mass and $B$-band luminosity (${M}_\odot~{L}_\odot^{-1}$)           & $\frac{M_{\rm {\ion{H}{i}}}}{L_{\rm B}}$      & $       0.2   ~\pm~  0.03  $ & this work                       \\
Ratio of {\ion{H}{i}} mass and $I$-band luminosity (${M}_\odot~{L}_\odot^{-1}$)           & $\frac{M_{\rm {\ion{H}{i}}}}{L_{\rm I}}$      & $       0.1   ~\pm~  0.01  $ & this work                       \\
Ratio of dynamical mass and {\ion{H}{i}} mass.                                             & $\frac{M_{\rm dyn}}{M_{\rm {\ion{H}{i}}}}$    & $ >$$91     ~\pm~ 25     $ & this work                       \\
Ratio of dynamical mass and $B$-band luminosity (${M}_\odot~{L}_\odot^{-1}$)            & $\frac{M_{\rm dyn}}{L_{\rm B}}$               & $ >$$ 22     ~\pm~  7.3   $ & this work                       \\
Ratio of dynamical mass and $I$-band luminosity (${M}_\odot~{L}_\odot^{-1}$)               & $\frac{M_{\rm dyn}}{L_{\rm I}}$               & $ >$$  10.2   ~\pm~  3.4   $ & this work                       \\
\hline
\end{tabular} 
\end{table}