\documentclass[5pt,twocolumn]{article}
\topmargin=-102pt
\oddsidemargin=-42pt
\begin{document}
%....... Table 1 .......................................Six-columns table
\begin{table*}
\caption{The data for 37 Ba stars. In the seven columns are quoted
the HD or L\"{u} (1991) entry, the spectral group and extinction as obtained
in Sect. 2, the absolute visual magnitude between the lower and upper
estimates as derived in Sect. 3, and the proposed luminosity class (Sect. 4).
Note III = IIIab; II- : possibly IIIa and IVb- : possibly Va}
\begin{flushleft}
\begin{tabular}{cccccccccccccc}
\hline
HD&G&E(B-V)&Mvl&Mv&Mvu&LC&HD&G&E(B-V)&Mvl&Mv&Mvu&LC
\\ \hline
5395   &K0g & 0.00 & 0.69 & 0.62 & 0.54 & IIIb&
11658  &K1g & 0.00 & 1.06 & 0.72 & 0.32 & IIIb\\
16458  &K0g & 0.06 &-0.17 &-0.29 &-0.49 & IIIa&
30554  &K0g & 0.05 & 1.41 & 1.11 & 0.77 & IIIb\\
36650  &K0g & 0.07 & 1.64 & 1.21 & 0.67 & IIIb&
46407  &G8g & 0.00 & 1.11 & 0.88 & 0.62 & IIIb\\
50082  &G8g & 0.02 & 1.15 & 0.76 & 0.30 & IIIb&
50264  &G2d & 0.00 & 5.07 & 4.79 & 4.46 & V\\
51959  &K0g & 0.02 & 3.34 & 2.93 & 2.42 & IVa&
65699  &K0g & 0.04 &-1.64 &-1.97 &-2.37 & II\\
65854  &G8g & 0.01 & 2.71 & 2.39 & 2.01 & IVa&
67447  &K0g & 0.01 &-1.86 &-2.27 &-2.79 & II\\
Lu 139 &K0g & 0.10 & 2.57 & 2.14 & 1.61 & IVa&
77912  &K0g & 0.00 &-1.71 &-2.03 &-2.40 & II\\
83548  &G8g & 0.00 &-0.14 &-0.35 &-0.56 & IIIa&
87080  &G5d & 0.00 & 4.23 & 3.87 & 3.45 & IVb-\\
89175  &G8g & 0.05 & 1.14 & 0.78 & 0.35 & IIIb&
92626  &K2g & 0.00 & 0.18 &-0.24 &-0.74 & IIIa\\
95345  &K2g & 0.00 &-0.05 &-0.26 &-0.48 & IIIa&
101013 &K0g & 0.00 & 0.58 & 0.39 & 0.17 & III\\
104059 &F2d & 0.00 & 3.80 & 3.49 & 3.13 & V&
104979 &K0g & 0.00 & 0.60 & 0.52 & 0.43 & III\\
111315 &K1g & 0.04 &-0.46 &-0.64 &-0.84 & IIIa&
116713 &K1g & 0.00 & 1.22 & 1.12 & 1.10 & IIIb\\
123585 &F8d & 0.00 & 3.62 & 4.00 & 4.32 & V&
127392 &G4d & 0.00 & 4.45 & 4.73 & 5.15 & V\\
139195 &G8g & 0.00 & 1.08 & 0.97 & 0.86 & IIIb&
Lu 262 &G0d & 0.06 & 4.62 & 4.20 & 3.67 & V\\
168214 &K0d & 0.00 & 3.10 & 2.84 & 2.55 & IV&
175674 &K2g & 0.00 & 0.72 & 0.37 &-0.05 & III\\
199394 &G8g & 0.00 & 1.21 & 1.01 & 0.78 & IIIa&
202109 &G8g & 0.00 &-0.05 &-0.12 &-0.18 & IIIa\\
204075 &G4sg& 0.00 &-1.44 &-1.67 &-1.92 & II&
205011 &K0g & 0.00 & 0.66 & 0.44 & 0.19 & III\\
206778 &K4sg& 0.04 &-3.96 &-4.30 &-4.72 & Ib&
207585 &G4d & 0.00 & 4.60 & 4.20 & 3.71 & IVb-\\
218356 &K3g & 0.03 &-1.22 &-1.44 &-1.70 & II-\\
%
\hline
\end{tabular}
\end{flushleft}
\end{table*}

\begin{table*}
\begin{flushleft}
\begin{tabular}{cccccccccccccc}
\hline
HD&G&E(B-V)&Mvl&Mv&Mvu&LC&HD&G&E(B-V)&Mvl&Mv&Mvu&LC
\\ \hline
5825   &G6g & 0.00 & 0.94 & 0.45 &-0.19 & III&
29370  &K0g & 0.00 & 2.72 & 2.18 & 1.45 & IVa\\
30240  &G4g & 0.00 & 1.18 & 0.65 &-0.05 & IIIb&
31487  &K0g & 0.25 & 1.07 & 0.56 &-0.12 & III\\
46040  &K2g & 0.00 & 0.78 & 0.34 &-0.21 & III&
84610  &K0g & 0.07 & 0.81 & 0.32 &-0.31 & III\\
91208  &G6g & 0.02 & 1.45 & 0.99 & 0.40 & IIIb&
107541 &G8g & 0.02 & 3.62 & 3.16 & 2.58 & IV\\ 
119185 &G8g & 0.05 & 2.25 & 1.70 & 0.96 & IVa&
180996 &K0g & 0.14 & 0.80 & 0.25 &-0.50 & III\\
183915 &K1g & 0.11 & 0.17 &-0.34 &-1.01 & IIIa&
187308 &G8g & 0.11 & 0.61 & 0.13 &-0.50 & III\\
199435 &G8g & 0.07 & 1.36 & 0.92 & 0.37 & IIIb&
199939 &K1g & 0.03 & 0.30 &-0.16 &-0.75 & IIIa-\\
201657 &K1g & 0.06 & 1.54 & 1.08 & 0.49 & IIIb-\\
%
\hline
\end{tabular}
\end{flushleft}
\end{table*}
\end{document}
