Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU

Details Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU Major outburst of periodic Comet Halley at a heliocentric distance of 14 AU

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263..367s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 367-386.

Astronomy and Astrophysics

Astrophysics

24

Comet Nuclei, Comet Tails, Halley'S Comet, Astronomical Models, Carbon Monoxide, Charge Coupled Devices, Image Processing, Particle Size Distribution

Scientific paper

The properties and evolution of the major outburst experienced by Comet Halley at 14 AU during February-March 1991 are studied. It is found that the observed halo is a segment of a conical surface populated by solid particles ejected from a localized, temporarily activated region on the sunlit hemisphere of the spinning nucleus. The total mass of the ejecta was at least 10 exp 12 g and CO was probably the prime driver, accelerating the smallest grains to a terminal velocity of about 45 m/s. The mass loading of the gas flow by particulate matter is enormous, with the mass production rate exceeding the expected production rate of CO by a factor of several tens.

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