Abstract We report the results of 40–160 micron broadband photometry of Comet Halley with apertures of 30–50 arcsecond diameter. Measurements of the spatial distribution of the far-infrared radiation at several wavelengths will also be discussed. A preliminary analysis of the data shows the following conclusions: (1) The brightness of the comet varied by nearly a factor of two on two successive days in 1986 March, during which the visible brightness also changed substantially and in the same sense. (2) The far-infrared energy distribution varied significantly in this period in the sense that the decrease in flux with increasing wavelengths was significantly shallower on the day when the comet was fainter. (3) The spectral slope on both days is considerably shallower than would be expected from an ensemble of grains most of which were much smaller than the observed wavelengths.
Far-infrared photometry of comet Halley from NASA's Kuiper Airborne Observatory
Advances in Space Research ; 5 , 12 ; 335-337
1985-01-01
3 pages
Article (Journal)
Electronic Resource
English
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