\begin{table}%t2
% \tabcolsep 0.10truecm
 \caption{Basic data of suspected NGC~1901 members (M in the last column, or not: NM).\label{tab2}}
%\centerline
{{ {\begin{tabular}{ccccccccccccccc}
 \hline
 \multicolumn{1}{c}{ID}         &
 \multicolumn{1}{c}{Designation}        &
 \multicolumn{1}{c}{$\alpha$} &
 \multicolumn{1}{c}{$\delta$}        &
 \multicolumn{1}{c}{$U$}       &
 \multicolumn{1}{c}{$B$}       &
 \multicolumn{1}{c}{$V$}       &
 \multicolumn{1}{c}{$I$}       &
 \multicolumn{1}{c}{$\mu_{\alpha}$}       &
 \multicolumn{1}{c}{$\mu_{\delta}$}       &
 \multicolumn{1}{c}{$RV Dic02$} &
 \multicolumn{1}{c}{$RV Dic03$} &
 \multicolumn{1}{c}{$RV Oct05$} &
 \multicolumn{1}{c}{$Spectral Type$}& 
 \multicolumn{1}{c}{Membership}\\
 \hline
 & & hh:mm:s & $\circ$:$\prime$:$\prime\prime$& mag & mag & mag & mag &~mas/yr & ms/yr &~km~s$^{-1}$ &~km~s$^{-1}$ &~km~s$^{-1}$ & &\\
\hline
  2&       HD~35294& 05:18:03.258&  --68:27:56.69&      9.63&    9.15&   8.38&   7.55&    1.0~$\pm$~1.2&       9.4~$\pm$~0.9&               & 4.3~$\pm$~1.0  &  2.4~$\pm$~1.4 &G2IV&M\\
  3&       HD~35183& 05:17:23.034&  --68:28:19.12&      9.51&    9.33&   9.15&   8.94&    1.5~$\pm$~1.2&       9.5~$\pm$~1.1&  1.8~$\pm$~0.8  & 29.0~$\pm$~1.0 &--2.5~$\pm$~0.5 &A3V&M\\
  4&       HD~35293& 05:18:02.089&  --68:21:19.48&      9.66&    9.46&   9.33&   9.12&   --0.8~$\pm$~1.0&      12.1~$\pm$~1.1& 27.9~$\pm$~1.0  & 60.6~$\pm$~1.0 & 48.9~$\pm$~0.7 &A1&M\\ 
  5&       HD~35462& 05:19:10.754&  --68:34:51.72&     10.28&   10.13&   9.81&   9.49&    1.2~$\pm$~1.3&      10.2~$\pm$~1.0&               & 31.6~$\pm$~1.0 & 18.3~$\pm$~0.8 &A2V&M\\
  6&      HD~269338& 05:18:52.918&  --68:34:13.35&     10.76&   10.65&  10.37&  10.08&   --0.4~$\pm$~1.2&      12.1~$\pm$~1.2&        & 21.0~$\pm$~1.1  & --5.8~$\pm$~0.6 &A5&M\\
  7&      HD~269319& 05:18:22.479&  --68:28:01.63&     10.64&   10.49&  10.22&   9.97&    2.8~$\pm$~1.3&      11.0~$\pm$~1.0& 27.6~$\pm$~1.0  &       & --0.9~$\pm$~0.4 &A5&M\\
  8&      HD~269312& 05:18:11.983&  --68:25:36.34&     10.82&   10.68&  10.40&  10.11&    2.3~$\pm$~2.2&       7.8~$\pm$~1.3& --1.1~$\pm$~0.7  &       & --6.7~$\pm$~0.4 &&M\\
  9&      HD~269310& 05:17:59.168&  --68:31:27.72&     10.92&   10.75&  10.46&  10.14&    2.7~$\pm$~2.3&       8.3~$\pm$~1.7& 10.0~$\pm$~0.4  &       & --0.1~$\pm$~0.4 &A7V&M\\
 10&      HD~269301& 05:17:35.815&  --68:21:47.16&     11.31&   11.26&  10.87&  10.56&    5.0~$\pm$~1.3&      11.2~$\pm$~1.3& --11.4~$\pm$~0.6 &       &  2.0~$\pm$~0.6 &A9V&M\\
 12&      HD~269315& 05:18:16.683&  --68:25:10.44&     11.84&   11.83&  11.38&  10.86&    3.8~$\pm$~1.3&       6.9~$\pm$~1.4& 16.9~$\pm$~0.7  &       & 17.7~$\pm$~0.7 &F5V&NM\\
 13&      HD~269324& 05:18:29.529&  --68:27:13.81&     12.11&   12.07&  11.55&  10.95&    2.9~$\pm$~1.5&      11.3~$\pm$~2.0&  0.6~$\pm$~1.6  &       & 0.2~$\pm$~1.4  &F6V&M\\
 14&      HD~269334& 05:18:42.738&  --68:27:32.76&     12.04&   12.03&  11.58&  11.09&    1.9~$\pm$~2.9&       8.3~$\pm$~1.3&  --1.8~$\pm$~1.1 &       & 0.3~$\pm$~0.9  &F3V&M\\
 17&  GSC~916200464& 05:18:27.560&  --68:31:28.36&     11.71&   12.37&  12.39&  12.35&   12.6~$\pm$~5.0&      --2.0~$\pm$~2.4& 268.6~$\pm$~1.6  &       &       &G5V&NM\\
 20&  GSC~916200834& 05:19:05.214&  --68:30:45.75&     12.74&   12.80&  12.27&  11.67&   --1.8~$\pm$~2.7&      11.7~$\pm$~1.5& --0.9~$\pm$~0.9  &       &  0.2~$\pm$~1.3 &F8V&M\\
 23&  GSC~916200682& 05:18:41.691&  --68:22:29.24&     14.07&   13.36&  12.31&  11.38&    1.1~$\pm$~5.9&      --2.8~$\pm$~5.9& 8.2~$\pm$~1.6   &       & 8.7~$\pm$~2.2 &K0&NM\\
 25&  GSC~916201005& 05:17:26.939&  --68:25:41.23&     13.32&   13.16&  12.53&  11.79&    1.6~$\pm$~5.9&      30.4~$\pm$~5.9& 24.9~$\pm$~0.9  &       & 27.5~$\pm$~1.0 &F7&NM\\
 27&  GSC~916200626& 05:18:19.173&  --68:26:25.15&     13.21&   13.21&  12.60&  11.97&    0.7~$\pm$~2.4&       9.9~$\pm$~1.3& --3.4~$\pm$~0.6  &       &   1.3~$\pm$~1.3&F8V&M\\
 36& MACS~0517684015& 05:17:40.773&  --68:29:04.73&     14.52&   14.22&  13.34&  12.35&   10.3~$\pm$~5.9&      32.6~$\pm$~5.9& 32.6~$\pm$~1.1  &       & 35.5~$\pm$~1.5&&NM\\
 40&   UCAC~2-139  & 05:18:25.564&  --68:17:19.25&     14.48&   14.37&  13.74&  12.96&   --2.2~$\pm$~5.9&       3.8~$\pm$~5.9& 295.9~$\pm$~2.4 &       & 298.8~$\pm$~3.5&&NM\\
 41& GSC~0916200216& 05:17:51.066&  --68:24:34.62&     17.43&   15.54&  13.76&  12.15&    5.7~$\pm$~5.9&       4.5~$\pm$~5.9&  30.1~$\pm$~0.1 &       &  32.2~$\pm$~0.2&&NM\\
 \hline
 \end{tabular}}}}
\end{table}