Thermal Infrared Imaging of Comet p/ Halley

Details Thermal Infrared Imaging of Comet p/ Halley Thermal Infrared Imaging of Comet p/ Halley

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..601c&link_type=abstract

Astronomy and Astrophysics, Vol.187, NO. 1+2/NOV, P. 601, 1987

Astronomy and Astrophysics

Astrophysics

7

Scientific paper

Thermal infrared images (λ = 10.8, 12.8 and 19.2 μm) of comet P/Halley were obtained on 1986 March 28.7, 29.7 and 30.7 UT using the NASA-MSFC 20-pixel bolometer array at the NASA Infrared Telescope Facility. A preliminary analysis of the observations shows the following results: (1) the presence of spatial structure indicative of dust ejection occurring mainly on the sunward side of the nucleus; (2) a dust coma deficient in large particles (radius ≳ 100 μm) compared with that of comet P/Giacobini-Zinner; (3) temporal variability which is consistent with an extrapolation of a quasi-sinusoidal lightcurve observed by IUE on 1986 March 23, 24, and 25; (4) a maximum, at the nuclear condensation, of the color temperature and the strength of the silicate emission feature.

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