\begin{table}%t7 %\centering \par \caption{\label{table:Hipparcos}The Hipparcos asteroid photometric dataset.} \begin{tabular}{cccccccc} \hline\hline Object Number & $N_{{\rm tot}}$ & $N<0.01$ & $N<0.02$ & $N<0.03$ & $N<0.04$ & $N<0.05$ & $\langle\sigma\rangle$ \\ \hline \textbf{1} & 65 & \textbf{40} & \textbf{63} & \textbf{65} & \textbf{65} & \textbf{65} & 0.010 \\ \textbf{2} & 63 & \textbf{20} & \textbf{43} & \textbf{56} & \textbf{60} & \textbf{62} & 0.017 \\ \textbf{3} & 60 & \emph{12} & \textbf{38} & \textbf{58} & \textbf{60} & \textbf{60} & 0.018 \\ \textbf{4} & 58 & \textbf{48} & \textbf{58} & \textbf{58} & \textbf{58} & \emph{58} & 0.008 \\ \textbf{5} & 81 & \emph{1} & \emph{18} & \textbf{42} & \textbf{60} & \textbf{70} & 0.032 \\ \textbf{6} & 91 & \emph{16} & \textbf{63} & \textbf{85} & \textbf{90} & \textbf{91} & 0.018 \\ \textbf{7} & 69 & \textbf{23} & \textbf{52} & \textbf{66} & \textbf{68} & \textbf{69} & 0.015 \\ \textbf{8} & 56 & \emph{4} & \emph{24} & \textbf{41} & \textbf{52} & \emph{55} & 0.024 \\ 9 & 40 & \emph{4} & \emph{22} & \emph{38} & \emph{40} & \emph{40} & 0.020 \\ \textbf{10} & 51 & \emph{3} & \emph{11} & \emph{30} & \textbf{46} & \emph{48} & 0.029 \\ \textbf{11} & 68 & \emph{8} & \emph{25} & \textbf{46} & \textbf{56} & \textbf{64} & 0.027 \\ 12 & 24 & \emph{1} & \emph{10} & \emph{16} & \emph{19} & \emph{21} & 0.028 \\ 13 & 34 & \emph{0} & \emph{3} & \emph{14} & \emph{24} & \emph{29} & 0.035 \\ 14 & 45 & \emph{4} & \emph{17} & \emph{30} & \emph{38} & \emph{42} & 0.027 \\ \textbf{15} & 83 & \emph{6} & \textbf{32} & \textbf{62} & \textbf{75} & \textbf{82} & 0.024 \\ 16 & 49 & \emph{1} & \emph{10} & \emph{21} & \emph{31} & \emph{41} & 0.035 \\ \textbf{18} & \emph{100} & \emph{4} & \emph{27} & \textbf{54} & \textbf{80} & \textbf{93} & 0.030 \\ 19 & 30 & \emph{0} & \emph{2} & \emph{11} & \emph{18} & \emph{24} & 0.039 \\ \textbf{20} & 61 & \emph{5} & \emph{19} & \emph{38} & \textbf{48} & \emph{57} & 0.028 \\ 22 & 63 & \emph{1} & \emph{10} & \emph{24} & \emph{43} & \emph{50} & 0.039 \\ 23 & 66 & \emph{2} & \emph{8} & \emph{20} & \emph{35} & \emph{46} & 0.042 \\ 27 & 35 & \emph{3} & \emph{14} & \emph{24} & \emph{30} & \emph{32} & 0.027 \\ 28 & 33 & \emph{0} & \emph{2} & \emph{11} & \emph{16} & \emph{25} & 0.041 \\ \textbf{29} & 74 & \emph{9} & \textbf{41} & \textbf{63} & \textbf{71} & \textbf{73} & 0.021 \\ 30 & 48 & \emph{0} & \emph{3} & \emph{13} & \emph{28} & \emph{35} & 0.044 \\ 31 & 14 & \emph{0} & \emph{0} & \emph{8} & \emph{13} & \emph{14} & 0.033 \\ 37 & 32 & \emph{1} & \emph{2} & \emph{17} & \emph{24} & \emph{27} & 0.036 \\ \textbf{39} & 112 & \emph{7} & \textbf{50} & \textbf{82} & \textbf{102} & \textbf{109} & 0.024 \\ \textbf{40} & 103 & \emph{2} & \emph{14} & \emph{37} & \textbf{53} & \textbf{73} & 0.041 \\ \textbf{42} & 51 & \emph{4} & \emph{22} & \textbf{40} & \textbf{49} & \emph{49} & 0.024 \\ 44 & 53 & \emph{4} & \emph{13} & \emph{29} & \emph{41} & \emph{49} & 0.030 \\ 51 & 14 & \emph{1} & \emph{1} & \emph{7} & \emph{10} & \emph{14} & 0.035 \\ 63 & 12 & \emph{0} & \emph{3} & \emph{8} & \emph{10} & \emph{11} & 0.031 \\ 88 & 36 & \emph{0} & \emph{0} & \emph{10} & \emph{16} & \emph{31} & 0.040 \\ 115 & 33 & \emph{0} & \emph{5} & \emph{9} & \emph{16} & \emph{19} & 0.047 \\ 129 & 40 & \emph{0} & \emph{6} & \emph{18} & \emph{28} & \emph{37} & 0.035 \\ 192 & 32 & \emph{0} & \emph{4} & \emph{12} & \emph{21} & \emph{28} & 0.037 \\ 196 & 14 & \emph{0} & \emph{1} & \emph{4} & \emph{10} & \emph{13} & 0.038 \\ 216 & 21 & \emph{1} & \emph{3} & \emph{6} & \emph{14} & \emph{19} & 0.037 \\ 230 & 35 & \emph{2} & \emph{8} & \emph{20} & \emph{30} & \emph{32} & 0.031 \\ \textbf{324} & 73 & \emph{5} & \emph{22} & \textbf{40} & \textbf{58} & \textbf{67} & 0.030 \\ \textbf{349} & 92 & \emph{1} & \emph{24} & \textbf{64} & \textbf{80} & \textbf{88} & 0.028 \\ \textbf{354} & 98 & \emph{0} & \emph{24} & \textbf{48} & \textbf{73} & \textbf{86} & 0.032 \\ 451 & 29 & \emph{0} & \emph{3} & \emph{13} & \emph{20} & \emph{25} & 0.036 \\ \textbf{471} & 112 & \emph{2} & \emph{21} & \textbf{48} & \textbf{80} & \textbf{94} & 0.034 \\ 511 & 64 & \emph{1} & \emph{15} & \emph{26} & \emph{42} & \emph{47} & 0.038 \\ 532 & 40 & \emph{4} & \emph{19} & \emph{29} & \emph{37} & \emph{39} & 0.024 \\ \textbf{704} & 82 & \emph{4} & \emph{12} & \emph{33} & \textbf{55} & \textbf{77} & 0.034 \\ \hline \end{tabular} \begin{list}{}{} \item[Note:] For each object, identified by its number, the total number of observations is shown, as well as the number of observations with nominal accuracy less than $0.01$, $0.02$, $0.03$, $0.04$, $0.05$ mag, respectively. The last column gives the average error $\langle\sigma\rangle$ of the observations. Bold characters in the Table are used to indicate objects with data for which the nominal requirements for successful inversion as derived from Fig.~\ref{testerrore} are met. \end{list} \end{table}