Dust from periodic comet Encke - Large grains in short supply

Details Dust from periodic comet Encke - Large grains in short supply Dust from periodic comet Encke - Large grains in short supply

Aug 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978a%26a....68..429s&link_type=abstract

Astronomy and Astrophysics, vol. 68, no. 3, Aug. 1978, p. 429-435.

Astronomy and Astrophysics

Astrophysics

17

Comets, Interplanetary Dust, Particle Size Distribution, Densitometers, Solar Orbits, Emissions, Cosmic Dust, Comets, Encke, Comet, Clouds, Particles, Grain Size, Mass, Albedo, Perihelion, Revolution, Photometry, Reflectivity

Scientific paper

A photographic observation of periodic comet Encke is analyzed which reveals the emission of large dust grains from the comet. Photometric reduction of the photographic plate is described, and a two-dimensional isodensitometer scan of P/Encke is presented. An analytical expression is obtained for the average mass-loss rate of the dust over the revolution period of about 1200 days. A comparison of the results for P/Encke with previous results for P/d'Arrest indicates that both comets shed dust at just about equal average rates. It is concluded that the current contribution of P/Encke to the interplanetary dust is quite negligible if the dust particles reflect more than 1% of light and that smaller dust grains probably tend to contribute more mass than larger grains.

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