Extended atmospheres of outer planet satellites and comets

Details Extended atmospheres of outer planet satellites and comets Extended atmospheres of outer planet satellites and comets

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aeri.reptt....s&link_type=abstract

Interim Report, Aug. - Oct. 1985 Atmospheric and Environmental Research, Inc., Cambridge, MA.

Computer Science

Cometary Atmospheres, Dissociation, Hydrogen, Molecules, Particle Trajectories, Planetary Atmospheres, Ultraviolet Spectrometers, Water, Halley'S Comet, Pioneer Venus 1 Spacecraft, Venus (Planet)

Scientific paper

The new cometary hydrogen particle-trajectory model, completed last year, has been used successfully to analyze observations of Comet P/Giacobini-Zinner. The Pioneer Venus Orbiter Ultraviolet Spectrometer observed the comet at 1216 A (hydrogen Lyman-a) on 11 September 1985 when the comet was 1.03 AU from the Sun and 1.09 AU from Venus. The analysis implies a production rate at 1.03 AU 2.3 x 10 to the 28th power/sec of the water molecules which photodissociate to produce the observed hydrogen. An upper limit for the H2O production rate of Comet P/Halley of 5 x 10 to the 28th power/sec at 2.60 AU was also obtained from the Pioneer Venus instrument.

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