The ground-based observations for the Halley outburst were supplied by
groups using many supporting astronomical observatories.   Listed
below are the separate CTIO telescopes with appropriate observational
parameters for which data were submitted.
 
Cerro Tololo Interamerican Observatory (4 m)
longitude -70 degree 48.9' and latitude -30 degree 09.9' at 2215 m
altitude
TEK 1024#2 CCD camera (0.4723 arcsec/pix)