\begin{table}%t8
\caption{\label{table:8}Pluto DE418 and plu017 ephemerides offsets with time.}
%\centering
\par
\begin{tabular}{c c c c c}
\hline\hline \noalign{\smallskip}
 Event        &  Central  &  \multicolumn{2}{c}{Observed -- Ephem.} & Note \\
              &  instant  &  $\Delta\alpha$cos$\delta$ &  $\Delta\delta$ &  \\
              &  years    &  mas &  mas & \\
\hline                           
2005 July 11  &    2005.5254       &  $+$35  &  $-$26 & p \\
2006 April 10 &    2006.2731       &  $-$73  &  $+$00 & p \\
2006 June 12  &    2006.4468       &  $+$63  &  $+$19 & p \\
2006 June 12  &    2006.4468       &  $+$49  &  $+$15 & 1 \\
2006 June 12  &    2006.4468       &  $+$56  &  $+$17 & a \\
2007 March 18 &    2007.2100       &  $-$48  &  $+$30 & p \\
2007 March 18 &    2007.2100       &  $-$46  &  $+$30 & 2 \\
2007 March 18 &    2007.2100       &  $-$47  &  $+$30 & a \\
2007 May 12   &    2007.3597       &  $-$38  &  $+$36 & p \\
2007 June 09  &    2007.4371       &  $-$14  &  $+$53 & p \\
2007 June 14  &    2007.4499       &  $-$49  &  $+$57 & p \\
2007 July 31  &    2007.5799       &  $+$42  &  $+$64 & p \\
2007 July 31  &    2007.5799       &  $+$42  &  $+$61 & 3 \\
2007 July 31  &    2007.5799       &  $+$42  &  $+$62 & a \\
2008 June 22  &    2008.4803       &  $+$37  &  $+$96 & p \\
2008 June 24  &    2008.4758       &  $+$73  &  $+$63 & p \\
2008 June 24  &    2008.4758       &  $+$73  &  $+$73 & p \\
2008 August 25&    2008.6494       &  $+$02  &  $+$53 & p \\
2008 August 25&    2008.6494       &  $+$04  &  $+$52 & 4 \\
2008 August 25&    2008.6494       &  $+$03  &  $+$52 & a \\
\hline
\end{tabular}
\tablefoot {DE418 and plu017 ephemerides offsets of Pluto with time. Offsets marked~``p'' were determined from fittings of past occultations in 2005$-$2008, taking as reference LNA-based star positions (Table~\ref{table:7}) derived for these events. Four extra offsets from four common events were also independently measured (``1''~= Young et~al. \cite{Young2008}; ``2''~= Young et~al. \cite{Young2007}; ``3''~= Olkin et~al., in~prep.; ``4''~= Buie et~al. \cite{Buie2009}); for these common occultations, averaged offsets with the corresponding ``p''~values are marked~``a''. The offsets are in the sense observed minus ephemeris. For the 2006~April~10 event, no~occultation occurred (this was actually predicted), but the  offset  could be derived (at 20~mas level) due to high resolution adaptative optics observations of Pluto and the star made at the ESO-VLT 8~m Telescope UT4 (Yepun) at Paranal Observatory, Chile, with the NACO instrument. The event of 2005~July~11 involved Charon, while the event of 2008~June~22 involved both Pluto and Charon occulting the same star. In all other cases, the events concern stellar occultations by Pluto alone. For the double 2008~June~22 event, only one ephemeris offset was considered for ($\alpha$,~$\delta$), as~both Pluto/Charon occultations furnish identical values within 1~mas. For the 2008~June~24 occultation by Pluto, two ephemeris offsets were used from two possible solutions. There was only one cord observed in Hawaii, but the event was near central with the two possible solutions only 10~mas apart from each other in the perpendicular direction of motion (mostly in declination).}
\end{table}