The ESA mission to Comet Halley [PDF]
The Europeon Space Agency's approximately Giotto mission plans for a launch in July 1985 with a Halley encounter in mid-March 1986 4 weeks after the comet's perihelion passage.
Reinhard, R.
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Comparison of the 3.36 micrometer feature to the ISM [PDF]
It has been noted that the 3.36 micrometer emission feature is not the same as that of any ISM band at 3.4 micrometer. This is documented herein. There is no convincing analog to the cometary 3.36 micrometer emission feature seen in the Interstellar ...
Brooke, Timothy Y., Tokunaga, Alan T.
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Interpretation of the ion mass spectra in the mass range 25-35 obtained in the inner coma of Halley's comet by the HIS-sensor of the Giotto IMS Experiment [PDF]
The IMS-HIS double-focussing mass spectrometer that flew on the Giotto spacecraft covered the mass per charge range from 12 to 56 (AMU/e). By comparing flight data, calibration data, and results of model calculations of the ion population in the inner ...
Altwegg, K. +8 more
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Ion Propulsion Module (IPM) technology readiness assessment: 1985 Halley's Comet rendezvous mission [PDF]
An assessment of the risk of utilizing ion propulsion to perform a rendezvous mission with Halley's comet in 1985 is presented, and consideration recommendations for reducing identified risks to the lowest possible level at project start in October 1978 ...
West, J.
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Determination of the observation conditions of celestial bodies with the aid of the DISPO system [PDF]
The interactive system for determining the observation conditions of celestial bodies is described. A system of programs was created containing a part of the DISPO Display Interative System of Orbit Planning.
Kazakov, R. K., Krivov, A. V.
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Experimental studies of gas trapping in amorphous ice and thermal modelling of comets: Implications for Rosetta [PDF]
The trapping of mixtures of CO, CH4, N2 and Ar in amorphous water ice was studied experimentally. It is shown that the ice particles could not have been formed at a higher temperature and, subsequently, cool down.
Bar-Nun, Akiva
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Sublimation rates of carbon monoxide and carbon dioxide from comets at large heliocentric distances [PDF]
Using a simple model for outgassing from a small flat surface area, the sublimation rates of carbon monoxide and carbon dioxide, two species more volatile than water ice that are known to be present in comets, are calculated for a suddenly activated ...
Sekanina, Zdenek
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86th Annual Meeting of the Meteoritical Society (2024)
Meteoritics &Planetary Science, Volume 59, Issue S1, Page A1-A468, August 2024.
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Long slit spectroscopy of NH2 in comets Halley, Wilson, and Nishikawa-Takamizawa-Tago [PDF]
Long-slit spectra of comets Halley, Wilson and Nishikawa-Takamizawa-Tago were obtained with the 3.9 meter Anglo-Australian Telescope. Spectra of comets Halley and Wilson were obtained with the IPCS at a spectral resolution of 0.5 A and a spatial ...
Heyd, Rodney +5 more
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