Airborne spectrophotometry of P/Halley from 20 to 65 microns

Details Airborne spectrophotometry of P/Halley from 20 to 65 microns Airborne spectrophotometry of P/Halley from 20 to 65 microns

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b.111g&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 111-116 (SEE N

Physics

Cosmic Dust, Halley'S Comet, Infrared Spectra, Spectrophotometry, Airborne Equipment, Color, Comet Nuclei, Comet Tails, Space Observations (From Earth)

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 ≡ 30 - 50 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 main results of the observations are: (1) The absence of any strong (>10%) spectral features. (2) The color temperature of the dust varies over time scales as short as 2 days, but is higher than that expected for a rapidly rotating blackbody at the same distance from the sun. (3) The color temperature does not vary within 1 arcmin of the nucleus, but the coma is brighter on the sunward side than on the antisunward side.

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