\begin{table}%t1
\caption{Characteristics of program stars.}
\label{Tab1}
%\centerline
{\begin{tabular}{cccccc}
\hline\hline
Star   & $V$ & $T_{\rm eff}$, K& $\log~g$ & $V_{\rm t}$, km~s$^{-1}$ & Rem \\
\hline
RX Vir &  8.7--9.1 & 5950   & 4.00     &  1.5 & SRd:   \\
AB Leo & 10.7--13.2 & 4130   & 0.00     &  2.4 & SRd    \\
CK Vir & 10.2--11.0 & 4200   & 0.20     &  2.3 & SRd    \\
SV UMa &  9.1--10.6 & 4300   & 0.00     &  2.4 & SRd    \\
TY Vir &  8.0--8.5 & 4350   & 0.30     &  2.4 & SRd    \\
\hline
\end{tabular}}
\medskip
\par
Classification of the stars is given following the $GCVS$. According to the $ASAS$ database 
({\tt http://www.astrouw.edu.pl/$\sim$gp/asas/ asas.html}) RX Vir seems to be a constant star.
\end{table}