P/Halley activity in November 1985

Details P/Halley activity in November 1985 P/Halley activity in November 1985

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..591b&link_type=abstract

In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 591-594 (SEE N88-21884 14-91)

Astronomy and Astrophysics

Astronomy

Comet Nuclei, Halley'S Comet, Rotation, Astronomical Photography, Outgassing, Precession

Scientific paper

Photographs of P/Halley taken on a 50 to 70 cm Schmidt and a 2 cm RCC telescope are presented.The U- and B-plates of 12 and 13 Nov., 1985, show an ejection from the inner coma region towards the south. On 15 and 16 Nov., on U- and B-plates again, a strong ejection was recorded, extended to the north-northeast. At the same time in the R-band only a slight deformation of the coma can be seen. To explain these observations a model is proposed interpreting them as a high velocity ejection of matter off the rotating and precessing comet nucleus. Using this model, the orientation of the nucleus spin axis and the locations of the ejection sources are determined.

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