\begin{table}%t1 \caption{\label{geometry}{\it Herschel} observing geometry for Orcus and Makemake.} %\centering \par \begin{tabular}{lcccllll} \hline \hline \noalign{\smallskip} Target & $r$ [AU] & $\Delta$ [AU] & $\alpha$ $[^\circ]$ & $H_V$ [mag] & $\Delta_{\rm mag}$ & $P$ [h] & Ref. \\ \hline 136472 Makemake & 52.14 & 52.40 & 1.05 & 0.14 $\pm$ 0.05 & 0.014/0.029 & 7.65 & 1, 2 \\ 90482 Orcus & 47.88 & 47.76 & 1.19 & 2.43 $\pm$ 0.07 & 0.04 $\pm$ 0.01 & 10.47 & 1, 3 \\ \hline \end{tabular} \tablefoot {$r$: Sun-target distance, $\Delta$: {\it Herschel}-target distance, $\alpha$: phase angle, $H_V$~magnitudes, lightcurve~$\Delta_{\rm mag}$, and the rotation period~[hours], references are given for the last three columns.}\vspace{-2mm} \tablebib {(1) Thirouin et~al. (\cite{thirouin10}); (2) Heinze \& de Lahunta (\cite{heinze09}); (3)~Ortiz et~al. (\cite{ortiz06}).} \end{table}