\begin{table}%t2
\caption{\label{obs}Circumstances of spectroscopic observations.}
%%\centering

\par
\begin{tabular}{cccccccc} 
\hline \hline \noalign{\smallskip}
Object & Instr\tablefootmark{a}  &   Date  &  UT$_{\rm start}$  &  $T_{\rm exp}$   &   Airm  &   Standard Star (Airm)  \\
&&& (hh:mm)&  (s) && \\
\hline
(52872) Okyrhoe &FORS2 &  Feb. 04, 2008 & 06:33  & 1800  & 1.14 & SA102 1081 (1.13) \\
(52872) Okyrhoe&ISAAC&  Feb. 03, 2008  & 07:02 & 1080 & 1.155--1.176 & HIP 045953 (1.166) \\
(52872) Okyrhoe &SINFONI &  Feb. 03, 2008  &05:28  & 7800 & 1.128--1.204 & SA102 1081 (1.140) \\
(73480) 2002 PN$_{34}$ &FORS2 &  Nov. 10, 2007 & 00:51 & 2800 & 1.22 & SA115 271 (1.13) \\
(73480) 2002 PN$_{34}$ & SINFONI &  Nov. 10, 2007  & 00:32 & 6000& 1.161--1.384 &  SA115 271 (1.167) \\
(73480) 2002 PN$_{34}$ & SINFONI &  Nov. 12, 2007  & 01:25 & 3600  & 1.247--1.678 &  SA115 271 (1.296) \\
(90482) Orcus &FORS2 &  Feb. 04, 2008  & 05:25 & 2400 & 1.07 & SA102 1081 (1.11) \\
(90482) Orcus &ISAAC&  Feb. 03, 2008  & 05:36 & 2880  &1.058--1.087& HIP 045953 (1.060) \\
(90482) Orcus &SINFONI &  Feb. 04, 2008 & 03:54 & 12~600  &1.058--1.252  & SA102 1081 (1.135) \\
\hline
\end{tabular}
\tablefoot {\tablefoottext{a}{FORS2 measures visible wavelength (0.4$-$0.8~$\mu$m), visible spectroscopy is from \citet{Fornasier2009}, ISAAC measures $J$~band wavelengths (1$-$1.4~$\mu$m), SINFONI measures $H+K$~band wavelengths (1.4$-$2.4~$\mu$m).}}
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\end{table}