Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981aj.....86.1559a&link_type=abstract
Astronomical Journal, vol. 86, Oct. 1981, p. 1559-1566.
Astronomy and Astrophysics
Astronomy
30
Astronomical Photography, Comets, Interplanetary Gas, Molecular Gases, Cn Emission, Emission Spectra, Gas Density, Hydroxyl Emission, Rates (Per Time), Comets, Bradfield Comet, Gases, Photometry, Distance, Comparisons, Data, Emissions, Hydroxyl Ion, Production Rate, Molecules, Models, Cyanide, Vaporization, Composition, Hypotheses, Observations, Flux, Parameters, Data Reduction, Density, Abundance
Scientific paper
The Comet Bradfield 1979 X provided the most recent opportunity to obtain quantitative photometric data on a comet. Although the comet was not unusually luminous, its very close approach to earth made it possible to observe it from the time of discovery at a heliocentric distance of just over 0.5 AU until it was beyond 1.5 AU from the Sun. The observations conducted are discussed along with aspects of data reduction. It was found that the OH production of comets can be experimentally studied on the basis of a routine procedure. The Comet Bradfield 1979 X was one of the gassiest comets ever observed, comparable to Comet P/Encke. The production rates of all molecular species were found to decline sharply with heliocentric distance.
A'Hearn Michael F.
Birch Peter V.
Millis Robert L.
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