|
McDonald Obs. observations of 9P/Tempel 1 by A. Cochran
|
|
|
Citation |
Cochran, A. L., Barker, E. S., Caballero, M. D., and
Gyorgey-Ries, J., McDonald Observatory 9P/Tempel 1 Data V1.0.
EAR-C-LCS-5-9PTMPL1-SPECTRA-V1.0. NASA Planetary Data System,
2009. |
Digital Object Identifier (DOI) |
10.26007/pc41-b661
|
Data Set Abstract |
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. |
Search/Access Data |
SBN Comet Website
|
|
|
Additional Information |
Mission Information |
SUPPORT ARCHIVES
|
Data Set Information |
EAR-C-LCS-5-9PTMPL1-SPECTRA-V1.0 |
Instrument Host Information |
MCD27
|
Instrument Information |
LCS
|
Target Information |
9P/TEMPEL 1 (1867 G1)
|
|
|