\begin{table}%t1
\caption{\label{tab:spirals}Parameters of the spiral arms.}
%\centering
\small
\begin{tabular}{l c c c c c}
\hline\hline\noalign{\smallskip}
    Arm & $k$ & $R_{*}$ & $\phi_{0}$ \\
    & & [kpc] & [radians] \\
\hline
    Norma & 4.25 & 3.48 & 1.57 \\
    Carina-Sagittarius & 4.25 & 3.48 & 4.71 \\
    Perseus & 4.89 & 4.90 & 4.09 \\
    Crux-Scutum & 4.89 & 4.90 & 0.95 \\
\hline
\end{tabular}
\end{table}