Table 1: Observations of Comet Hale-Bopp. n: number of comet spectra per night, $r_{\rm h}$ and $\Delta $: heliocentric and geocentric distances, $\beta $: phase angle, $\Delta \psi $: spatial scale per pixel, $\Delta \lambda $: wavelength scale per pixel, x: slit width. Negative $r_{\rm h}$ indicates observations before perihelion on April 1, 1997.
\begin{displaymath}\begin{tabular}{lcccrlcccc} \hline\hline & & $r_{\rm h}$ & $... ...VLT UT1 & FORS 1 & 0.20 & 2.61 & 2.0 \\ \hline \end{tabular} \end{displaymath}
$^\ast $ Night not photometric, only used for reddening determination. $^{\ast\ast}$ No flux calibration, night not used.
$^{\ast\ast\ast}$ Magellan cloud in background, night not used.
$^{\dagger}$ Slit orientations along projected solar direction and perpendicular to it.

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