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Proceedings Paper

Spectral Images Of The Inner Coma Of Comet Halley Taken From The VEGA 2 Interplanetary Spacecraft
Author(s): Guy Moreels; Jacques Clairemidi
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Paper Abstract

Composite images of the inner coma of comet Halley are constructed in superposing the monochromatic charts transmitted by the three-channel spectrometer during the encounter session on March 9, 1986. The instrument covers the 275- to 710- nm range with a spectral reso-lution of 7 nm. The scanned field of view is a rectangle of dimensions 2° x 1,5°. The images are constructed in displaying the signal of a single pixel or the average value of several pixels. In a second step, combinations of operations are used to interpret the images. At a given wavelength, two luminous components are discriminated: the solar scattered continuum and the selective emission of molecular species. The images provide the spatial distributions of dust an of the OH, CN and C2 molecules. The spatial extent is slightly different from a species to another. The distribution of molecular emissions show evidence of gaseous jets which extend to distances longer than 40000 km. The color of dust may be depicted and appears to be blue at the location of jets.

Paper Details

Date Published: 11 October 1989
PDF: 7 pages
Proc. SPIE 1135, Image Processing III, (11 October 1989); doi: 10.1117/12.961653
Show Author Affiliations
Guy Moreels, Observatoire de Besancon (France)
Jacques Clairemidi, Observatoire de Besancon (France)

Published in SPIE Proceedings Vol. 1135:
Image Processing III
Jacques Frank Duvernoy, Editor(s)

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