\begin{table}%t8
%\centering
\par
\caption{\label{Table:results}Comparison of known spin periods and pole coordinates, and results from inversion of Hipparcos data.} 
\begin{tabular}{cccccccc}
\hline\hline
Object Number & \multicolumn{2}{c}{Ground-based observations} & \multicolumn{3}{c}{Inversion solution} \\
  & $P$ (h) & Pole & $P$ (h) & Pole  & $N_{{\rm obs}}$ \\ 
  \hline
 1 &  $9.075$ &  $(332, 70)$ &  $18.116$ &   $(337, 85)$ & $65$ \\
 2 &  $7.8132$ & $(193, 43)$ &  $7.63075$ &  $(198, 56)$ & $43$ \\
 &          &           &    $11.30525$ & $(18, -46)$ & $43$\\
 &          &           &    $7.21859$ & $(206, 58)$ & $60$\\
 3 &  $7.210$  & $(106, 34)$, $(320, 60)$ & $13.59130$ & $(125, 45)$ & $58$  \\
 &          &           &     $7.20522$ & $(282, -21)$ & 58\\
 4 &  $5.342$ & $(326, 53)$ & $10.68272$ & $(350, 70)$  &  $58$  \\
  &         &          &  $5.34214$ & $(345, 65)$ & $58$\\
 5 &  $16.800$  & $(123, 51)$, $(319, 49)$ & $16.80189$ & $(288, 49)$ & $81$\\
 6 &  $7.2745$  & $(355, 41)$, $(338, 44)$ & $7.27290$ & $(45, 75)$ & $85$\\
 &          &          &  $7.27275$ & $(93, 37)$, $(295, 29)$  & $85$ \\
 &         &          &  $14.79105$ & $(338, 44)$ & $63$\\
10 & $27.623$  & $(111, -36)$, $(298, -37)$ & $37.54308$ & $(12, 71)$  & $46$\\
 &          &           & $27.65959$ & $(5, -87)$ & $46$\\
15 & $6.083$ & $(106, -74)$, $(353, -60)$ & $6.08273$ & $(347, -64)$ & $83$ \\
20 & $8.098$ & $(23, 59)$, $(203, 60)$ &  $8.09971$ & $(48, -55)$ & $48$ \\
28 & $15.695$  & $(83, 18)$, $(275, 40)$ & $15.70581$ among others & $(86, 32)$ for this $P$ & 33 \\
39 & $5.138$ & $(324, 31)$ & $5.13830$ & $(335, 47)$, $(126, 20)$ & $109$ \\
40 & $8.910$ & $(17, 31)$, $(204, 33)$ & $8.91069$ & $(24, -31)$ & $37$ \\
42 & $13.5970$  & $(119, -18)$, $(291, -20)$ & $13.58563$ & $(84, 69)$ & $40$ \\
44 & $6.422$ & $(100, 53)$, $(296, 52)$ & $6.42160$ & $(298, 36)$ & $41$ \\
129 & $4.9572$ & $(200, 65)$ & $5.11263$ & $(218, -1)$ &  $37$ \\
192 & $13.622$ & $(131, 36)$, $(310, -40)$ & $13.37675$ & $(101, -41)$ &  $21$  \\
    &          &                           & $13.62106$ & $(95, -35)$  & $21$ \\
216 & $5.385$ & $(72, 16)$, $(232, 37)$ & $5.42337$ & $(54, 4)$ & $21$ \\
    &         &                         & $5.38536$ & $(226, 44)$ & $21$ \\
230 & $23.9845$ & $(83, 36)$, $(239, 40)$ & $21.433$ & $(272, -43)$ & $32$ \\
349 & $4.7012$ & $(153, 34)$, $(330, 12)$ & $4.69120$ & $(201, 71)$  & $80$ \\
    &         &            & $4.70153$ & $(137, -11)$ & $80$ \\
354 & $4.277$ & $(360, 18)$ & $4.28972$ & $(335, -15)$ & $86$ \\
471 & $7.113$ & $(21, 31)$, $(235, 56)$ & $7.10540$ & $(246, 74)$  & $94$ \\
511 &  $5.1294$  & $(300, 30)$ & $56.88594$ & $(129, -53)$ & $47$ \\
    &            &             & $37.32501$ & $(342, 63)$ & $47$\\
 \hline
\end{tabular}
\begin{list}{}{}
\item[Note:] Pole coordinates are given in ecliptic coordinates (longitude, latitude). The numbers of Hipparcos observations adopted in different inversion attempts are also listed.
\end{list}
\end{table}