Structures in the coma of comet Halley

Details Structures in the coma of comet Halley Structures in the coma of comet Halley

May 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..144g&link_type=abstract

Nature (ISSN 0028-0836), vol. 321, May 8, 1986, p. 144-147.

Astronomy and Astrophysics

Astronomy

17

Coma, Halley'S Comet, Brightness Distribution, Comet Nuclei, Cosmic Dust, Jets, Comets, Halley, Comae, Structure, Earth-Based Observations, Brightness, Optical Properties, Distribution, Dust, Production Rate, Gases, Models, Morphology, Telescope Methods, Imagery

Scientific paper

It is noted that dense dust jets were expected to be encountered by the spacecraft penetrating the coma of comet Halley in March 1986. At the time of encounters, remote observations of the global distribution of coma constituents were to complement the detailed in situ measurements of the optical brightness distribution of the coma, made in November 1985, when the comet was 1.75 AU from the sun. From the total brightness, a dust production rate of 1.5 x 10 to the 6th grams per second is deduced, but results show that cometary dust and gas production, which seem to be correlated, are strongly anisotropic and time-variable. Structures in the coma can be revealed by comparison with a physical model of the coma, but astrometry of the comet nucleus is adversely affected by the anisotropic brightness distribution in the coma.

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