urn:nasa:pds:gbo-mcdonald:lcs-9p:description
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McDonald Observatory 9P/Tempel 1 Spectral Observations Overview
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Cochran, A. L.; Barker, E. S.; Caballero, M. D.; Gyorgey-Ries, J.
2019
We report on low-spectral resolution observations of comet
9P/Tempel 1 from 1983, 1989, 1994 and 2005 using the 2.7m Harlan
J. Smith telescope of McDonald Observatory. This comet was the
target of NASA's Deep Impact mission and our observations allowed
us to characterize the comet prior to the impact. In the published
paper, we showed that the comet decreased in gas production from
1983 to 2005, with the decrease being different factors for
different species. OH decreased by a factor 2.7, NH by 1.7, CN by
1.6, C3 by 1.8, CH by 1.4 and C2 by 1.3. Despite the decrease in
overall gas production and these slightly different decrease
factors, we found that the ratios of the gas production rates of
OH, NH, C3, CH and C2 that of CN were constant over all of the
apparitions. We saw no change in the production rate ratios after
the impact. We found that the peak gas production occurred about
two months prior to perihelion. This data set represents the
integrated fluxes and column densities, mentioned in the published
paper, which were used to derive the production rates in the paper.
2019-03-15
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Migration from PDS3 dataset.cat file (B. Hirsch)
2019-03
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