\begin{table}%t2
\caption{\label{table_datura_obs}Aspect data for observations of (1270) Datura.}
\small%\centerline
{
\begin{tabular}{cccrrrl}
\hline 
\hline
Date & $r$  & $\Delta$ & $\alpha\phantom{g}$ & \multicolumn{1}{c}{$\lambda$} &
 \multicolumn{1}{c}{$\beta$} & Obs. \\
 & [AU] & [AU] & [deg] & \multicolumn{1}{c}{[deg]} &
  \multicolumn{1}{c}{[deg]} &  \\
\hline	
  1990 11 18.5 & 2.058 & 1.177 & 16.5 &  92.1 & $-4.0$ & W97 \\
 1991 01 16.2 & 2.201 & 1.334 & 15.6 &  78.6 & $-0.7$ & W97 \\
  2000 10 14.0 & 1.955 & 1.341 & 28.1 &  88.2 & $-5.4$ & S05 \\
  2006 07 08.0 & 2.078 & 1.096 & 10.0 & 264.8 & $ 0.6$ & PdM \\
 2006 07 27.8 & 2.031 & 1.166 & 19.9 & 261.6 & $-0.7$ & SAAO \\
 2006 07 29.8 & 2.026 & 1.176 & 20.7 & 261.5 & $-0.8$ & SAAO \\
 2007 10 20.0 & 2.245 & 2.185 & 25.9 & 125.8 & $ 0.2$ & S   \\
 2007 10 21.0 & 2.247 & 2.176 & 26.0 & 126.1 & $ 0.2$ & S   \\
 2007 10 21.1 & 2.247 & 2.174 & 26.0 & 126.1 & $ 0.2$ & PdM \\
 2007 11 17.2 & 2.310 & 1.894 & 24.8 & 132.4 & $ 1.2$ & PdM \\
 2007 11 21.0 & 2.319 & 1.854 & 24.3 & 132.9 & $ 1.4$ & S   \\
 2007 11 28.1 & 2.335 & 1.782 & 23.1 & 133.7 & $ 1.7$ & PdM \\
 2007 12 01.1 & 2.342 & 1.753 & 22.5 & 133.9 & $ 1.9$ & PdM \\
 2008 01 06.0 & 2.418 & 1.495 & 10.2 & 130.6 & $ 3.7$ & K   \\
 2008 01 15.8 & 2.437 & 1.471 &  5.5 & 128.1 & $ 4.2$ & S   \\
 2008 02 02.9 & 2.472 & 1.498 &  4.5 & 123.0 & $ 4.8$ & PdM \\
 2008 02 03.9 & 2.474 & 1.502 &  4.9 & 122.8 & $ 4.9$ & S   \\
 2008 04 09.8 & 2.581 & 2.221 & 22.5 & 119.6 & $ 4.9$ & K   \\
 2009 02 27.0 & 2.599 & 2.104 & 21.1 & 229.4 & $ 6.9$ & S   \\
 2009 03 04.1 & 2.593 & 2.034 & 20.5 & 229.9 & $ 7.1$ & S   \\
 2009 05 04.0 & 2.499 & 1.497 &  3.3 & 222.4 & $ 8.2$ & B   \\
 2009 05 14.0 & 2.481 & 1.493 &  6.3 & 219.7 & $ 7.9$ & B   \\
 2009 06 12.9 & 2.423 & 1.623 & 18.2 & 214.3 & $ 6.4$ & PdM \\
\hline
\end{tabular}}
\smallskip
 The first three are archival
 while the next 20 are new. The table lists Datura's
 distance from the Sun~$r$ and from the Earth~$\Delta$, the solar phase angle
 $\alpha$, the geocentric ecliptic coordinates of the asteroid $(\lambda,
 \beta)$, and the observatory (W97 -- Wisniewski et~al. \cite{Wisniewski1997}; S05 --
 Sz\'ekely et~al. \cite{ekely2005}; PdM -- Pic~du~Midi, 1~m; SAAO -- South African
 Astronomical Observatory, 1~m; K -- Kharkiv Observatory, 70~cm; S --
 Simeiz Observatory, 1~m; B -- Borowiec Observatory, 0.5~m). 
\end{table}