\begin{table}%t1
 \caption{\label{tbl:fit}Coefficients $a_{i}$ for the four CMEs.}
\small
 %\centering
\par
\begin{tabular}{c c c c c c c}
   \hline
   \hline\noalign{\smallskip}
Object & $a_{0}$ & $a_{1} $ & $a_{2}$ & $a_{3}$ & Acceleration (m
s$^{-2}$) &  Time in~UT at $t=0$ \\
\hline%& $a_{5}$
CME1/core & 1.063 & --0.412 & 0.806 & --0.260  &52.3& 00:00 \\
CME1/LD & 1.061 & 0.785 & 0.147 & 0 &15.9&  00:00 \\
CME2/core & 1.191 & --0.465 & 0.326 &0&35.2& 00:12\\
CME2/LD & 1.043 & 1.077 & 0.147 & 0 &15.4&  00:12\\
CME3 & 3.839& 0.529 & 0.051 & 0 &5.6& 07:31 \\
CME4 & 1.43 & 3.530 & 3.133& 0.350& 330 &17:28\\
\hline
\end{tabular}
\end{table}