\begin{table}%t7 \caption{\label{table:7}Astrometry of candidate stars observed at the 0.6~m B\&C LNA telescope for 2005$-$2008 Pluto stellar occultations.} %\centering \par \begin{tabular}{c c c c c c c c c c} \hline\hline \noalign{\smallskip} Event & (RA, Dec) & ICRS (J2000) & Magnitude & \multicolumn{2}{c}{Error} & No. & \multicolumn{2}{c}{Mean error} & UCAC2\\ & Epoch & (RA, Dec) & ($R$) & $E_{\alpha}$ & $E_{\delta}$ & Obs. & $\sigma_{\alpha}$ & $\sigma_{\delta}$ & stars\\ & years & h ~m ~~~s ~~~~~~~$^{\circ}$ ~~~$\arcmin$ ~~~~~$\arcsec$ & & mas & mas & & mas & mas & No. \\ \hline 2005 July 11 & 2005.2560 & 17 28 55.0167 --15 00 54.726 & 14.9 & 11 & 15 & 25 & 50 & 52 & 66 \\ 2006 April 10 & 2006.1620 & 17 46 06.8788 --15 46 10.113 & 16.0 & 33 & 32 & 255 & 56 & 55 & 107 \\ 2006 June 12 & 2006.4449 & 17 41 12.0769 --15 41 34.488 & 15.0 & 11 & 15 & 13 & 61 & 59 & 186 \\ 2007 March 18 & 2007.2165 & 17 55 05.6948 --16 28 34.369 & 15.1 & 08 & 11 & 12 & 59 & 62 & 162 \\ 2007 May 12 & 2007.3641 & 17 53 32.1024 --16 22 47.359 & 16.5 & 56 & 30 & 8 & 57 & 58 & 176 \\ 2007 June 09 & 2007.4598 & 17 50 50.6520 --16 22 29.309 & 17.0 & 16 & 03 & 4 & 56 & 60 & 94 \\ 2007 June 14 & 2007.4588 & 17 50 20.7402 --16 22 42.207 & 15.6 & 48 & 54 & 190 & 58 & 55 & 108 \\ 2007 July 31 & 2007.4634 & 17 45 41.9894 --16 29 31.639 & 14.0 & 15 & 24 & 68 & 60 & 56 & 72 \\ 2008 June 22 & 2008.4044 & 17 58 33.0147 --17 02 38.340 & 13.5 & 11 & 09 & 50 & 50 & 48 & 76 \\ 2008 June 24 & 2008.4044 & 17 58 22.3941 --17 02 49.346 & 15.9 & 13 & 17 & 50 & 50 & 48 & 76 \\ 2008 August 25& 2008.6494 & 17 53 27.1040 --17 15 27.541 & 15.6 & 06 & 04 & 30 & 56 & 56 & 26 \\ \hline \end{tabular} \tablefoot{Used positions are always within a month of event epoch. Error estimates come from the dispersion (standard deviation) of values from the observations. Mean error of (RA,~Dec) solutions and average number of UCAC2 reference stars are given. The UCAC2-based candidate star positions were zero-point-corrected toward ICRS using averaged UCAC2 minus ICRF position offsets ($\Delta\alpha$cos$\delta$~= $-$12~$\pm$~8~mas; $\Delta\delta$~= $-$5~$\pm$~7~mas) of five ICRF~quasars nearby Pluto present coordinates (see~Assafin et~al. \cite{Assafin2005}). For the 2006~June~12 event, useful CCD observations were only acquired in April~2007, but the final position is at the event epoch, as proper motions ($\mu_{\alpha}$~= $-$10.6~mas~yr$^{-1}$, $\mu_{\delta}$~= $-$12.9~mas~yr$^{-1}$) were applied for this UCAC2~star. The 2008~August~25 event star was observed with the 1.6~m P\&E LNA telescope (FOV~of 5$\arcmin$~sizes and pixel scale of~0$\farcs$17). Actually, 2005~July~11 refers to a stellar occultation by Charon.} \vspace*{4mm} \end{table}