\begin{table}%t2
       %\centering
\par
       \caption{Observational circumstances of asteroid targets for the Rosetta mission.}
        \label{tab2}
\begin{tabular}{lrccccccc} \hline \hline
\par
Object  &  Night &  UT-start  & $T_{\rm exp}$ & Tel. & Instr. & Grism/prism & 
Slit     & airm. \\ 
        &        & (hh:mm) & (s)    &      &        &       & 
(arcsec) &       \\ 
\hline
 437 Rhodia  & 25 Jan. 04 & 15:35 &  600 & IRTF & SpeX & 
0.8--2.5 $\mu$m & 0.8 & 1.30 \\
 437 Rhodia  & 03 Mar. 04 & 10:07 &  960 & IRTF & SpeX & 
0.8--2.5 $\mu$m & 0.8 & 1.17 \\
1393 Sofala  & 25 Jan. 04 & 15:00 &  720 & IRTF & SpeX &
0.8--2.5 $\mu$m & 0.8 & 1.05 \\
2513 Baetsle & 25 Jan. 04 & 14:21 & 1320 & IRTF & SpeX &
0.8--2.5 $\mu$m & 0.8 & 1.10 \\
2867 Steins  & 25 Jan. 04 & 13:21 & 1100 & IRTF & SpeX &
0.8--2.5 $\mu$m & 0.8 & 1.02 \\
3050 Carrera & 25 Jan. 04 & 11:00 & 1200 & IRTF & SpeX &
0.8--2.5 $\mu$m & 0.8 & 1.08 \\
\hline
  21 Lutetia & 26 May  04 & 10:13 & 660   & NTT & EMMI &            
    GRISM 1 (0.4--0.95 $\mu$m)   &  1.5      & 1.55     \\ 
2513 Baetsle & 30 Jan. 04 & 8:40 & 960 & NTT & EMMI & 
GRISM 1 (0.4--0.95 $\mu$m) & 1.5 & 1.13 \\
2867 Steins  & 29 Jan. 04 & 7:58 & 720 & NTT & EMMI & 
GRISM 1 (0.4--0.95 $\mu$m) & 1.0 & 1.40 \\
2867 Steins  & 25 May 04  & 23:28  & 1200     & NTT & EMMI &
 GRISM 1 (0.4--0.95 $\mu$m)      & 1.5       & 1.41     \\
3050 Carrera   & 30 Jan. 04 & 6:50 &  960 & NTT & EMMI & 
GRISM 1 (0.4--0.95 $\mu$m) & 1.5 & 1.29 \\
5538 Luichewoo & 29 Jan. 04 & 7:00 & 1920 & NTT & EMMI & 
GRISM 1 (0.4--0.95 $\mu$m) & 1.0 & 1.20 \\
\hline
 437 Rhodia  & 29 Feb. 04 & 02:42 &  180 & TNG & DOLORES & 
LR-R (0.51--0.95 $\mu$m) & 1.5 & 1.28 \\
1393 Sofala  & 29 Feb. 04 & 03:46 &  360 & TNG & DOLORES & 
LR-R (0.51--0.95 $\mu$m) & 1.5 & 1.09 \\
2513 Baetsle & 29 Feb. 04 & 04:06 & 1200 & TNG & DOLORES & 
LR-R (0.51--0.95 $\mu$m) & 1.5 & 1.31 \\
3418 Izvekov  & 29 Feb. 04 & 02:18 & 480 & TNG & DOLORES & 
LR-R (0.51--0.95 $\mu$m) & 1.5 & 1.07 \\
\hline
1393 Sofala    & 1 Mar. 04 & 05:08 &  480 & TNG & NICS & 
AMICI (0.8--2.5 $\mu$m) & 1.5 & 1.25 \\
2513 Baetsle   & 2 Mar. 04 & 02:44 & 1920 & TNG & NICS &
AMICI (0.8--2.5 $\mu$m) & 1.5 & 1.19 \\
3418 Izvekov   & 2 Mar. 04 & 01:38 & 1920 & TNG & NICS &
AMICI (0.8--2.5 $\mu$m) & 1.5 & 1.08 \\
5538 Luichewoo & 2 Mar. 04 & 03:51 & 1920 & TNG & NICS & 
AMICI (0.8--2.5 $\mu$m) & 1.5 & 1.32 \\ 
\hline
\end{tabular}
\end{table}