Astronomy and Astrophysics – Astronomy
Scientific paper
May 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.321..320k&link_type=abstract
Nature (ISSN 0028-0836), vol. 321, May 15, 1986, p. 320-326. Research supported by the Max-Planck-Gesellschaft zur Foerderung de
Astronomy and Astrophysics
Astronomy
228
Astronomical Photography, Giotto Mission, Halley'S Comet, Spaceborne Photography, Color Photography, Coma, Comet Nuclei, Dust, Jets, Outgassing, Comets, Halley, Spacecraft Observations, Mission Description, Experiments, Giotto, Hmc, Halley Multicolor Camera, Imagery, Comae, Comet Nuclei, Shape, Dust, Emssions, Albedo, Jets, Photographs, Equipment
Scientific paper
The first imaging results from the Halley Multicolour Camera during the Giotto fly-by of comet Halley provide images centred on the brightest part of the inner coma which show the silhouette of a large, solid and irregularly shaped cometary nucleus and jet-like dust activity visible in reflected sunlight. The nucleus is at least 15 km long and ≡10 km wide; its geometrical albedo is very low (< 4%). Only minor parts of the surface are active, most of it being covered by non-volatile material. Dust jets dominate the inner coma and are restricted to the sub-solar hemisphere. Preliminary interpretations of these observations are presented.
Arpigny Claude
Barbieri Carlo
Bonnet Roger-Maurice
Cazes S.
Coradini Marcello
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