\begin{table}%t2
\caption{\label{orb.tab}Orbital solutions for \object{HD 90264}.}
%\centering
\par
\begin{tabular}{lcccccccc}
\hline
\hline \noalign{\smallskip}
&~~$P$  & $\gamma~$  & $K_{{\rm He-w}}$ & ~ $K_{{\rm Hg-Mn}}$ & $e$ & $\omega$ & $T_0$\tablefootmark{a}   \\
&~~$\rm{[days]}$ & $[{\rm km~s^{-1}}]$ & $~ [{\rm km~s^{-1}}]$ &  $~ [{\rm km~s^{-1}}]$ &   &  & [JD]   \\
\hline
~~~~\ion{Hg}{ii} & 15.726 $\pm$ 0.001 & 22.2 $\pm$ 1.0 & --  & 78.9 $\pm$ 1.4 &    0\tablefootmark{b}               & --             & 2453540.00 $\pm$ 0.04 \\
\ion{Hg}{ii}+\ion{Mg}{ii} & 15.727  $\pm$ 0.001 & 22.5 $\pm$ 0.8 & 61.8 $\pm$ 2.0 & 75.6 $\pm$ 1.4 &    0\tablefootmark{b}               &      --        & 2452824.46 $\pm$ 0.07 \\
\ion{Hg}{ii}+\ion{Mg}{ii} & 15.727 $\pm$ 0.001   & 22.7 $\pm$ 0.7 & 62.2 $\pm$ 1.9 & 76.0 $\pm$ 1.5 & 0.044 $\pm$ 0.014 & 138$^\circ$ $\pm$ 25$^\circ$  & 2452814.78 $\pm$ 1.05 \\
\hline
\end{tabular}
\tablefoot {\tablefoottext{a}{Time of maximum velocity for circular orbit and time of periastron passage for eccentric orbit;} 
\tablefoottext{b}{assumed value to obtain the orbital solution.}}
\end{table}