\begin{table} %t4
\par
      \caption{\label{tab-6}Stellar properties.}
               \small%\centerline
{
         \begin{tabular}{llccccccccclc}
           \hline\hline
            Star &Spect. &$M_{K}$& Teff   & Ref.&  Mass  & [Fe/H] & Ref.& Derived $T_{\rm eff}$ & $v\sin i$ & $\log R'_{HK}$& Instr. &  Radius\\  
                    &  Type    &               &    K     & & [$M_{\odot}$]    &    &               &  K             & km~s$^{-1}$     &             &    & [$R_{\odot}$] \\  
\hline \noalign{\smallskip}
            GJ~663~A & K0V    &  --       &      --      &     &           --                                               &  --0.20 &(3)         & 4843~$\pm$~134    &   --         &    --      & VINCI      & 0.817~$\pm$~0.016 \\   
            GJ~166~A & K0.5V &  3.90~$\pm$~0.02&  5201 &(3) &   0.877~$\pm$~0.044      & --0.25 &(3)         & 5269~$\pm$~35      &   0.78    &  --4.87  & AMBER   & 0.770~$\pm$~0.021\\   
            GJ~570~A & K4V   &  4.20~$\pm$~0.03&  4758 &(3)  &   0.802~$\pm$~0.040      &   0.06 &(3)         & 4597~$\pm$~101    & 1.50     & --4.48 &  VINCI     &0.739~$\pm$~0.019  \\   
            GJ~845   & K5V     &  4.38~$\pm$~0.03&  4630 &(3)   &   0.762~$\pm$~0.038      & --0.06 &(3)          & 4568~$\pm$~59      &  1.46    & --4.56 &  VINCI     &0.732~$\pm$~0.006  \\  
            GJ~879   & K5Vp   &  4.54~$\pm$~0.08&  4574 &(3)   &   0.725~$\pm$~0.036      &  0.02 &(3)          & 4711 ~$\pm$~134   &  2.93    & --4.27 &  AMBER & 0.629~$\pm$~0.051   \\  
	   GJ~887   & M0.5V &  5.78~$\pm$~0.03& 3626 &(1)    &  0.503~$\pm$~0.025 &       -0.22  &(4)        & 3797 ~$\pm$~45      &   --         &  --        &  AMBER  & 0.459~$\pm$~0.011 \\                     
            GJ~551   & M5.5V &  8.80~$\pm$~0.04& 3042 &(1)    &  0.123~$\pm$~0.006  &  0.19        &(2)        & 3098~$\pm$~56        &  --        &   --         & AMBER & 0.141~$\pm$~0.007\\  
           \hline
         \end{tabular}}
         \smallskip
        References:   For $T_{\rm eff}$ and [Fe/H]:\\
(1) \citet{Segransan2003}; (2) \citet{Edvardsson1993}; (3) CORALIE and (4) \citet{Woolf2005}.\\
  For $v\sin i$ and $\log R'_{HK}$:
CORALIE.\\
 Masses for M-dwarfs are derived from \citet{Delfosse2000} while empirical relation from \citet{Xia2008} is used for K-dwarfs.\\
  Metallicity values provided are all directly determined by spectroscopy. 
   \end{table}