The disappearance of OH from comet P/Encke |
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Authors: | Michael F. A Hearn,Robert L. Millis,Don T. Thompson |
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Affiliation: | 1. Astronomy Program, University of Maryland, College Park, Maryland 20742, USA;2. Lowell Observatory, P.O. Box 1269, Flagstaff, Arizona 86002, USA |
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Abstract: | Photoelectric observations of Comet P/Encke during its 1980 apparition are combined with other published data to relate molecular production rates to the visual lightcurve. In addition to a substantial asymmetry about perihelion which is already well known, there are shorter-term variations in specific molecules which have not been duplicated by models. The most dramatic of these fluctuations is a rapid decrease by more than a factor of 3 in the production of OH at 0.75 AU preperihelion. |
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