\begin{table}%t3
  \caption{\label{table:observation} Summary of the MIDI observations of
    RY~Tau and calibrators. The dates, UT, $L$ (in m) and PA (in degrees, 
    measured from North to East) of the sky-projected baselines are
    listed. The airmass $AM$ in the right column is given for the time of fringe
    tracking.  The observations
    with a projected baseline of $79\ 
    {\rm m}$ and $81\ {\rm m}$ provided an almost identical result (see 
    Fig.~\ref{figure:vis-data}).}
  \hfill{}\begin{tabular}{cccccc}
    \hline 
    \hline 
    Date & UT & Object & $L$ & PA  & $AM$ \\
    \hline
    Nov.  1st, 2004 & 3:54--4:16 &  \object{HD~25604} &
    $74$ &  $96$ & $1,68$ \\  
    Nov. 1st, 2004 & 4:37--4:56 &    RY~Tau & $79$ &  $97$ &
    $1.83$ \\  
    Nov. 1st, 2004 & 4:58--5:07 &    RY~Tau & $81$ &  $95$ &
    $1.79$ \\  
    Nov. 1st, 2004 & 5:54--6:10 &  \object{HD~49161} & 
    $64$ &  $87$ & $1.56$\\   
    Nov. 1st, 2004 & 7:03--7:17 &  \object{HD~31421} &
    $89$ &  $82$ & $1.28$\\  
    \\                 
    Nov. 4th, 2004 & 0:01--0:26 & \object{HD~178345} &
    $57$ & $146$ & $1.42$\\
    Nov. 4th, 2004 & 2:19--2:47 & \object{HD~188603} &
    $46$ & $169$ & $2.47$\\
    Nov. 4th, 2004 & 3:16--3:54 &  HD~25604 & $61$ & $117$ &
    $1.75$ \\
    Nov. 4th, 2004 & 5:11--5:29 & \object{HD~20644} &
    $59$ & $102$ & $1.69$ \\
    Nov. 4th, 2004 & 7:18--7:36 &  \object{HD~37160} &
    $61$ & $107$ & $1.21$\\
    Nov. 4th, 2004 & 7:44--8:00 & RY~Tau & $49$ &  $92$ &
    $1.95$\\
    Nov. 4th, 2004 & 9:00--9:23 &  \object{HD~50778} &
    $61$ & $113$ & $1.04$\\
    \hline
  \end{tabular}\hfill{}
\end{table}