\begin{table}%t5
\caption{Aspect and color index of 44~Nysa.\label{tab5}}
%\centerline
{
\begin{tabular}{rrrccl}
\hline\hline
Year & Aspect & $\alpha$ & $U-B$ & $B-V$ & Ref.$^{a}$  \\
     & deg    &  deg     & mag & mag&  \\
     \hline
1954 &--75&23&0.24&0.69&GK\\
1970&  86&17&0.26&0.70&TT\\
1974&  70&5&--&0.71&ZH\\
1975&  95&21&0.27&0.70&Z\\
1981&--74&6&0.27&0.70&P\\
1982&  59& 0.9&0.37&0.74&this paper\\
1982&  59&15.6&0.21&0.75&this paper\\
\hline
\end{tabular}}
\par
\smallskip
$^a$ Groeneveld  Kuiper (1954) (GK); Piironen (\cite{Piironen82}) (P); 
Taylor~Tedesco (\cite{Taylor83}) (TT); Zappala   van~Houten-Groeneveld (1979) (ZH); Zellner et~al. (\cite{Zellner77}) (Z).
\end{table}