Airborne Spectrophotometry of p/ Halley from 20-MICRONS to 65-MICRONS

Details Airborne Spectrophotometry of p/ Halley from 20-MICRONS to 65-MICRONS Airborne Spectrophotometry of p/ Halley from 20-MICRONS to 65-MICRONS

Nov 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...187..635g&link_type=abstract

Astronomy and Astrophysics, Vol.187, NO. 1+2/NOV, P. 635, 1987

Astronomy and Astrophysics

Astrophysics

18

Scientific paper

The authors report on simultaneous 20 - 65 μm spectrometry and 100 μm photometry of P/Halley obtained on board the Kuiper Airborne Observatory (KAO) in 1985 December and 1986 April. Spectra with resolution λ/Δλ ≅ 20 - 40 were obtained with the NASA/Goddard 24-channel grating spectrometer. Measurements were made on the nucleus as well as 5 points along and perpendicular to the sun-tail direction. The comet spectrum is smooth and contains no strong (>6%) spectral features. The color temperature of the dust is higher than that expected for a rapidly rotating blackbody and varies over time scales as short as 2 days. The coma is brigther at these wavelengths on the sunward side than on the tailward side, but the color temperature does not vary within one arcmin of the nucleus. The spectrum is fitted with a power law distribution of dark, featureless, spherical grains.

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