\begin{table}%t1
\caption{\label{table:coefs}Coefficients for mass and radius fits.}
%\centering
\par
\begin{tabular}{lrr}
\hline\hline
\noalign{\smallskip}
 & Mass, $a_i$ & Radius, $b_i$ \\[-3.2mm]\\
\hline
const. & $0.458\pm0.017$ & $0.150\pm0.002$ \\
$X$ & $1.430\pm0.019$ & $0.434\pm0.005$ \\
$X^2$ & $0.329\pm0.128$ & --  \\
log $\rho$ & $-0.042\pm0.021$ & $-0.381\pm0.002$ \\
log $\rho^2$ & $0.067\pm0.019$ & -- \\
log $\rho^3$ & $0.010\pm0.004$ & -- \\
${\rm [Fe/H]}$ & $0.044\pm0.019$ & $0.012\pm0.004$ \\
\hline
\end{tabular}
\end{table}