| Data Set Abstract |
The database presented here is comprised entirely of observations
made utilizing conventional photoelectric photometers and
narrowband filters isolating 5 emission species (OH, NH, CN, C3
and C2) and continua. This work was initiated by A'Hearn and
Millis in 1976 and includes 2020 observations of 85 comets
obtained over 429 nights through the end of 1992. The total
number of observations, however, is not evenly distributed over
the 85 comets. The median number of observations for a comet is
6, with only a single observation obtained for 14 comets while
there were 820 observations of P/Halley. The majority of
observations were obtained at either Lowell Observatory or Perth
Observatory, however four other observatories were used including
an extensive campaign on comet P/Halley from the Cerro Tololo
Interamerican Observatory (CTIO). In this archive, results for a
subset of 68 comets are presented while the results for P/Halley
from this study are archived in the IHW archive. |
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