\begin{table}
\caption{Properties of groups.}             % title of Table
\label{table:1}      % is used to refer this table in the text
%\centering
                          % used for centering table
\begin{tabular}{r c c c c c c c c c c c}        % centered columns (4 columns)
\hline\hline                 % inserts double horizontal lines
Group & RA & DEC &  $z$ & $\sigma$  & $R_{200}$ & $M_{200}$ &
$N$ & $N_{200}$& GA & $f_{\eta_1}$& $f_{200}$  \\    % table heading
    &  ($\circ$) & ($\circ$) & & (km ${\rm s^{-1}}$) & (Mpc) & (${10^{14} ~M_\odot}$) & &  & & \\
\hline                        % inserts single horizontal line
  23 & 168.608 & $-4.008$ & 0.1010 & 264.202 & 0.65 & 0.35 & 16 & 13 & 2.894 & 0.645 & 0.812\\
  59 & 162.581 & $-0.332$ & 0.0949 & 221.623 & 0.55 & 0.21 & 13 & 10 & 3.263 & 0.687 & 0.769\\
  60 & 162.231 &  0.936 & 0.1070 & 262.031 & 1.28 & 2.66 & 65 & 18 & 2.939 & 0.500 & 0.276\\
  61 & 161.688 &  1.438 & 0.1068 & 290.062 & 1.20 & 2.19 & 73 & 22 & 4.152 & 0.550 & 0.301\\
  63 & 160.890 &  1.555 & 0.1065 & 198.729 & 1.03 & 1.37 & 46 & 10 & 2.992 & 0.520 & 0.217\\
  64 & 160.419 &  1.361 & 0.0726 & 169.913 & 0.79 & 0.61 & 43 & 14 & 2.903 & 0.625 & 0.325\\
  83 & 174.909 & $-1.110$ & 0.0777 & 236.053 & 0.99 & 1.20 & 54 & 20 & 2.746 & 0.541 & 0.370\\
  86 & 180.818 &  0.882 & 0.0782 & 125.600 & 0.66 & 0.35 & 36 & 12 & 2.357 & 0.566 & 0.333\\
  91 & 191.534 &  0.703 & 0.0892 & 155.980 & 0.89 & 0.88 & 80 & 9  & 3.483 & 0.562 & 0.112\\
  95 & 191.946 & $-0.213$ & 0.0898 & 219.657 & 0.95 & 1.06 & 58 & 20 & 2.409 & 0.541 & 0.344\\
 137 &  23.602 & $-32.823$& 0.0646 & 362.672 & 1.08 & 1.51 & 45 & 25 & 3.690 & 0.500 & 0.555\\
 139 &  32.829 & $-33.200$& 0.1065 & 179.301 & 0.84 & 0.75 & 34 & 12 & 3.235 & 0.604 & 0.352\\
 182 &   6.925 & $-30.745$& 0.1066 & 279.339 & 1.34 & 3.01 & 74 & 18 & 2.553 & 0.479 & 0.243\\
 187 &  10.290 & $-29.003$& 0.1089 & 165.089 & 0.90 & 0.93 & 59 & 12 & 2.654 & 0.562 & 0.203\\
 188 &  14.169 & $-30.784$& 0.0769 & 256.686 & 1.16 & 1.94 & 64 & 17 & 1.917 & 0.500 & 0.265\\
 189 &   9.426 & $-30.787$& 0.0613 & 249.968 & 0.93 & 0.98 & 36 & 15 & 3.259 & 0.541 & 0.416\\
 193 &  17.559 & $-29.663$& 0.1074 & 151.658 & 0.82 & 0.71 & 46 & 11 & 3.724 & 0.604 & 0.239\\
 195 &  15.688 & $-31.925$& 0.1087 & 222.339 & 0.98 & 1.21 & 40 & 16 & 2.759 & 0.541 & 0.400\\
 208 &  36.363 & $-30.062$& 0.0723 & 270.511 & 0.82 & 0.68 & 26 & 16 & 2.194 & 0.625 & 0.615\\
 216 &  47.233 & $-31.051$& 0.0650 & 222.393 & 1.09 & 1.55 & 59 & 16 & 3.593 & 0.550 & 0.271\\
 225 & 328.094 & $-28.863$& 0.0929 & 197.640 & 0.97 & 1.14 & 45 & 17 & 2.517 & 0.583 & 0.377\\
 245 & 352.361 & $-30.148$& 0.1057 & 378.582 & 1.60 & 5.16 & 58 & 12 & 2.168 & 0.479 & 0.206\\
 249 & 355.576 & $-30.284$& 0.0619 & 234.400 & 1.01 & 1.24 & 45 & 24 & 3.115 & 0.562 & 0.533\\
 250 & 355.214 & $-30.339$& 0.0801 & 246.493 & 0.71 & 0.43 & 22 & 14 & 1.855 & 0.645 & 0.636\\
 256 &  10.190 & $-26.482$& 0.1121 & 342.401 & 1.31 & 2.83 & 57 & 15 & 3.091 & 0.479 & 0.263\\
 258 &   9.870 & $-26.520$& 0.1009 & 158.659 & 0.66 & 0.36 & 19 &  8 & 3.615 & 0.666 & 0.421\\
 264 &  26.607 & $-26.639$& 0.0600 & 301.131 & 0.98 & 1.14 & 22 & 13 & 3.717 & 0.604 & 0.590\\
 266 &  32.245 & $-26.366$& 0.1162 & 271.840 & 0.83 & 0.72 & 17 & 10 & 2.157 & 0.562 & 0.588\\
 269 &  42.215 & $-26.001$& 0.1052 & 239.011 & 1.05 & 1.47 & 39 &11  & 2.986 & 0.500 & 0.282\\
 278 & 334.293 & $-26.673$& 0.0598 & 315.139 & 1.07 & 1.47 & 37 &15  & 2.351 & 0.520 & 0.405\\
 280 & 343.716 & $-25.911$& 0.0805 & 168.699 & 0.74 & 0.51 & 23 &12  & 2.690 & 0.566 & 0.521\\
 281 & 343.461 & $-25.517$& 0.0899 & 234.579 & 1.06 & 1.48 & 48 &19  & 2.711 & 0.541 & 0.395\\
\hline                                  %inserts single line
\end{tabular}
\end{table}