\begin{table}%t1
  \caption{\dd\ and photometric reference stars.}\label{table:1}
%\centering
\small
 \begin{tabular}{@{}cccc@{}}
 \hline\hline
  Star  & RA      & Dec     &  USNO A2  \\
        & (J2000.0) & (J2000.0) &  $R$ mag    \\ 
 \hline
 J205847.5+414637  & 20\hr 58\mm 47\fsec54 & +41\deg 46\arcm 37\farcs3 & 14.4  \\
 Star 1 & 20\hr 58\mm 53\fsec53 & +41\deg 46\arcm 28\farcs0 & 13.9  \\
 Star 2 & 20\hr 58\mm 45\fsec85 & +41\deg 45\arcm 06\farcs0 & 13.9  \\
 Star 3 & 20\hr 59\mm 05\fsec50 & +41\deg 44\arcm 20\farcs1 & 14.1  \\
 \hline
 \end{tabular}
 \end{table}