McDonald Observatory Spectral Observations of Comet 19P/Borrelly

Details McDonald Observatory Spectral Observations of Comet 19P/Borrelly McDonald Observatory Spectral Observations of Comet 19P/Borrelly

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999icar..141..307c&link_type=abstract

Icarus, Volume 141, Issue Icarus, pp. 307-315.

Computer Science

6

Scientific paper

We report on spectroscopic observations of the Deep Space 1 comet target, 19P/Borrelly. These observations were obtained during 1981, 1987, and 1994 at McDonald Observatory. We compute column densities for eight bands at a variety of positions within the coma and use these data and a Haser model in order to derive production rates for the gas. With these production rates, we show that Borrelly is a member of the carbon-chain molecule ``depleted'' class of comets. We also derive a measure of the dust in the coma (Afρ) and show that this is a moderately dusty comet. We see, for the first time, a hint that the ratio C3 and CH to CN production may vary with heliocentric distance.

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