Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97..254h&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, Jan. 1989, p. 254-261.
Astronomy and Astrophysics
Astronomy
48
Albedo, Chemical Composition, Cometary Atmospheres, Comets, Infrared Photometry, Astronomical Photometry, Color, Comet Nuclei, Emission Spectra, Interplanetary Dust, Comets, Wilson, Infrared, Wavelengths, Photometry, Telescope Methods, Earth-Based Observations, Thermal Properties, Emissions, Grains, Models, Size, Distribution, Parameters, Optical Properties, Dust, Comparisons, Short-Period Comets, Albedo, Color, Spectra, Production Rate
Scientific paper
1-20 micron filter photometry of comet Wilson (1986l) was obtained on May 29 - June 2, 1987 (r = 1.36 AU) and January 11 -14, 1988 (r = 3.75 AU) at the NASA Infrared Telescope Facility. The thermal emission at 1.36 AU has been fit with a model for a size distribution of small absorbing grains; the size and the optical properties of the dust (color, albedo, and thermal emission spectrum) appear typical of short period comets at similar r. No 10 micron silicate feature was evident. The dust-production rate on June 1 was about 5 x 10 to the 5th g/s. The geometric albedo of comet Wilson at r = 3.75 AU appears to be higher than that of comets measured at smaller r, after phase effects have been accounted for. Such albedos seem typical of comets at larger heliocentric distances.
Hanner Martha S.
Newburn Ray L.
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