\begin{table}%t4
\caption{Full widths at 90\% of the height of narrow emission components and
the separations of two peaks in~\km.}
%\centerline
 {\small  \begin{tabular}{lrrr}
 \hline \hline
\hspace*{8ex}  Date & March 20 & April 8 & May 17 \\
\hspace*{8ex}  JD & 3814.7 & 3833.6 & 3872.5 \\
\hline
 He~II~4686  & 28 & 23 & 20 \\
 H$\beta$   & 37/86 & 37/69 & 31 \\
 $[$O~III] 5007  & 10 & 13 &  \\
 $[$Ni XIII] 5116 &  & 49/74 &  \\
 Fe~II 5235 & 15 & 11 &  \\
 $[$Fe XIV] 5303 & 38 & 48/70 & 16/22 \\
 Fe~II 5316  & 14 & 13 & 9 \\
 $[$Fe~VII] 5721 & 11 & 15 &  \\
 $[$N~II] 5755 & 12 & 13 &  \\
 He~I~5876  & 47 & 33/41 & 24 \\
 O~IV 6106 &  &  & 9 \\
 $[$Fe X] 6374 &  &  & 15/22 \\
\hline
 \end{tabular}}
\medskip
JD: Julian date + 2450000; the numbers over the slash are separations between two peaks.
\end{table}