Lightcurve of comet Austin(1989c1) and its dust mantle development

Details Lightcurve of comet Austin(1989c1) and its dust mantle development Lightcurve of comet Austin(1989c1) and its dust mantle development

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992acm..proc..231h&link_type=abstract

In Lunar and Planetary Inst., Asteroids, Comets, Meteors 1991 p 231-234 (SEE N93-19113 06-90)

Computer Science

Brightness, Cometary Atmospheres, Comets, Interplanetary Dust, Light Curve, Outgassing, Solar Position, Energy Budgets, Extinction, Perihelions, Vaporizing, Water Vapor

Scientific paper

Brightness variations of comet Austin(1989c1) were investigated in terms of the variations of water production rate. We translated the visual brightness data into water production rates using Newburn's semi-empirical law. The curve of the water production rates as a function of heliocentric distance was compared with the model calculations that assumed energy balance between the solar incident and vaporization of water. Thermal flow in a dust mantle at a surface of the nucleus is also included in the model. The model calculations including the dust mantle are more favorable for the observed rate than non-dust mantle cases. The extinction after the perihelion passage suggests that the dust mantle developed gradually.

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