\begin{table}%t1 %\centering \par \caption{\label{tab00}Observing circumstances of (50000) Quaoar.} \begin{tabular}{l l l l l l l} \hline\hline Observation & Date & Time (UT) & $\lambda$ range ($\mu$m) & Spectral Res. & Integ. time (s) & Calib. Star\\ \hline FORS1 & 15 July 07 & 01:56--02:36 & 0.4--0.94 & 200 & 2400 & HD 147284\\ ISAAC & 15 July 07 & 03:07--03:27 & 1.1--1.4 & 500 & 1200 & HD 147284\\ SINFONI & 15 July 07 & 01:54--03:34 & 1.45--2.45 & 1500 (250) & 6000 & HD 147935 \\ VR Phot. & 15 July 07 & 01:33--01:33 & VR & -- & 40 & -- \\ JHK Phot. & 15 July 07 & 02:17--02:22 & ${\it JHK}_{\rm s}$ & -- & 300 & --\\ IRAC & 15 Sep. 07 & 01:12--02:10 & 3.6 \& 4.5 & 5.2 & 1600 & -- \\ & 18 Sep. 07 & 07:17--08:15 & 3.6 \& 4.5 & 5.2 & 1600 & -- \\ \hline \end{tabular} \end{table}