\begin{table}%t1 \caption{\label{observations}Observational circumstances.} \par %\centerline { \begin{tabular}{l l c c c} \hline\hline \noalign{\smallskip} Object & Date & $\Delta$ (AU) & $r$ (AU) & $\alpha$ (deg) \\ \hline % inserts single horizontal line (5145) Pholus & 12 Apr. 2008 & 21.212 & 21.864 & 2.0 \\ (10199) Chariklo & 3 Feb. 2008 & 13.311 & 13.395 & 4.2 \\ & 4 Feb. 2008 & 13.296 & 13.395 & 4.2 \\ (20000) Varuna & 4 Dec. 2007 & 42.605 & 43.391 & 0.8 \\ (42301) 2001 UR$_{163}$ & 5 Dec. 2007 & 49.625 & 50.308 & 0.8 \\ (42355) Typhon & 12 Apr. 2008 & 16.892 & 17.650 & 2.2 \\ (44594) 1999 OX$_{3}$ & 21 Sep. 2008 & 22.025 & 22.889 & 1.3 \\ & 22 Sep. 2008 & 22.033 & 22.888 & 1.3 \\ (52872) Okyrhoe & 3 Feb. 2008 & 4.883 & 5.800 & 3.9 \\ & 4 Feb. 2008 & 4.877 & 5.800 & 3.7 \\ (55576) Amycus & 12 Apr. 2008 & 15.205 & 16.056 & 1.9 \\ (55637) 2002 UX$_{25}$ & 6 Dec. 2007 & 41.263 & 41.975 & 0.9 \\ (55638) 2002 VE$_{95}$ & 5 Dec. 2007 & 27.297 & 28.248 & 0.5 \\ & 6 Dec. 2007 & 27.301 & 28.249 & 0.6 \\ & 22 Nov. 2008 & 27.379 & 28.341 & 0.5 \\ & 23 Nov. 2008 & 27.378 & 28.341 & 0.4 \\ (73480) 2002 PN$_{34}$ & 10 Nov. 2007 & 14.894 & 15.344 & 3.3 \\ (90377) Sedna & 21 Sep. 2008 & 87.416 & 88.015 & 0.5 \\ & 22 Sep. 2008 & 87.402 & 88.014 & 0.5 \\ (90482) Orcus & 3 Feb. 2008 & 46.904 & 47.807 & 0.5 \\ & 4 Feb. 2008 & 46.900 & 47.807 & 0.5 \\ (120061) 2003 CO$_{1}$ & 4 Feb. 2008 & 10.937 & 11.080 & 5.1 \\ & 12 Apr. 2008 & 10.179 & 11.123 & 1.8 \\ & 13 Apr. 2008 & 10.175 & 11.123 & 1.8 \\ (120132) 2003 FY$_{128}$ & 12 Apr. 2008 & 37.477 & 38.454 & 0.3 \\ (120178) 2003 OP$_{32}$ & 21 Sep. 2008 & 40.546 & 41.365 & 0.8 \\ (120348) 2004 TY$_{364}$ & 22 Nov. 2008 & 38.840 & 39.591 & 0.9 \\ & 23 Nov. 2008 & 38.849 & 39.591 & 1.0 \\ (136199) Eris & 7 Dec. 2007 & 49.652 & 50.310 & 0.8 \\ (144897) 2004 UX$_{10}$ & 4 Dec. 2007 & 38.145 & 38.837 & 1.0 \\ & 5 Dec. 2007 & 38.158 & 38.837 & 1.1 \\ & 6 Dec. 2007 & 38.170 & 38.837 & 1.1 \\ & 23 Nov. 2008 & 38.059 & 38.879 & 0.8 \\ (145451) 2005 RM$_{43}$ & 4 Dec. 2007 & 34.298 & 35.195 & 0.7 \\ & 7 Dec. 2007 & 34.316 & 35.196 & 0.7 \\ (145453) 2005 RR$_{43}$ & 4 Dec. 2007 & 37.623 & 38.511 & 0.6 \\ & 7 Dec. 2007 & 37.642 & 38.512 & 0.7 \\ (174567) 2003 MW$_{12}$ & 12 Apr. 2008 & 47.314 & 47.968 & 0.9 \\ & 13 Apr. 2008 & 47.302 & 47.968 & 0.9 \\ (208996) 2003 AZ$_{84}$ & 22 Nov. 2008 & 44.879 & 45.458 & 1.0 \\ & 23 Nov. 2008 & 44.865 & 45.457 & 1.0 \\ 2002 KY$_{14}$ & 21 Sep. 2008 & 7.802 & 8.649 & 3.8 \\ & 22 Sep. 2008 & 7.810 & 8.649 & 3.8 \\ 2003 UZ$_{117}$ & 22 Nov. 2008 & 38.420 & 39.368 & 0.4 \\ & 23 Nov. 2008 & 38.423 & 39.367 & 0.4 \\ 2003 UZ$_{413}$ & 4 Dec. 2007 & 41.171 & 42.004 & 0.7 \\ & 21 Sep. 2008 & 41.466 & 42.163 & 1.0 \\ & 22 Nov. 2008 & 41.276 & 42.197 & 0.5 \\ & 23 Nov. 2008 & 41.282 & 42.198 & 0.5 \\ 2007 UK$_{126}$ & 21 Sep. 2008 & 45.131 & 45.618 & 1.1 \\ & 22 Sep. 2008 & 45.117 & 45.617 & 1.1 \\ 2007 UM$_{126}$ & 21 Sep. 2008 & 10.202 & 11.163 & 1.5 \\ & 22 Sep. 2008 & 10.199 & 11.165 & 1.5 \\ 2007 VH$_{305}$ & 22 Nov. 2008 & 7.854 & 8.638 & 4.2 \\ & 23 Nov. 2008 & 7.863 & 8.636 & 4.3 \\ 2008 FC$_{76}$ & 20 Sep. 2008 & 10.968 & 11.690 & 3.5 \\ & 21 Sep. 2008 & 10.976 & 11.688 & 3.6 \\ 2008 SJ$_{236}$ & 22 Nov. 2008 & 5.522 & 6.364 & 5.0 \\ & 23 Nov. 2008 & 5.530 & 6.363 & 5.1 \\ \hline \end{tabular}} \par \tablefoot{$\Delta$, $r$ and $\alpha$ are the topocentric distance, the heliocentric distance, and the phase angle, respectively. } \end{table}