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

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aeri.repts....s&link_type=abstract

Interim Report, Aug. - Oct. 1984 Atmospheric and Environmental Research, Inc., Cambridge, MA.

Astronomy and Astrophysics

Astronomy

Cometary Atmospheres, Encke Comet, Ultraviolet Spectra, Atmospheric Composition, Hydrogen, Lyman Spectra, Models, Natural Satellites, Particle Trajectories, Photodissociation, Pioneer Venus 1 Spacecraft, Ultraviolet Astronomy, Water

Scientific paper

The cometary hydrogen particle-trajectory model was used successfully to analyze observations of Comet P/Encke. The Pioneer Venus Orbiter Ultraviolet Spectrometer observed the comet at 1216A (hydrogen Lyman-alpha) on 15 April 1984, when the comet was .58 AU from the Sun and 1.02 AU from Venus. The analysis implies a production rate at .58 AU of 3.3 x 10 to the 28th power/sec of the water molecules which photodissociate to produce the observed hydrogen.

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