The anomalous dust production in periodic Comet Encke

Details The anomalous dust production in periodic Comet Encke The anomalous dust production in periodic Comet Encke

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...73..508c&link_type=abstract

Icarus (ISSN 0019-1035), 73, March 1988, p. 508-515.

Physics

17

Comet Nuclei, Comet Tails, Encke Comet, Interplanetary Dust, Light Curve, Thermal Emission, Cn Emission, Hydroxyl Emission, Infrared Radiation, Infrared Telescopes, Interplanetary Gas, Meteoroid Dust Clouds, Solar Orbits

Scientific paper

Postperihelion thermal IR observations of Comet Encke lead to an estimation for the nucleus radius upper limit of 2.9. While preperihelion observations are noted to be inconsistent with most comets at the wavelengths in question, they are in approximate agreement with the visible continuum trend determined by Newburn and Spinrad (1985) in 1980 observations. A drop in intrinsic brightness occurring at a postperihelion heliocentric distance of 0.75 AU suggests that this comet's thermal lightcurve may involve an asymmetry about the perihelion which resembles that at visible wavelengths.

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