Distribution of neutral gas molecules at large distances from Halley's comet

Details Distribution of neutral gas molecules at large distances from Halley's comet Distribution of neutral gas molecules at large distances from Halley's comet

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987esasp.278..223e&link_type=abstract

In ESA, Proceedings of the International Symposium on the Diversity and Similarity of Comets p 223-227 (SEE N88-21884 14-91)

Physics

1

Ballistic Trajectories, Halley'S Comet, Neutral Gases, Trajectory Analysis, Density Distribution, Flow Velocity, Gas Density, Gas Dynamics, Gas Flow

Scientific paper

Ballistic trajectories of neutral gas molecules around Halley's comet are traced in the cometocentric frame up to large distances from the comet. It is shown that the density of gas significantly deviates from what is expected if the orbital motion of comet is disregarded. The outflow velocity of gas, required to reach spacecraft VEGA-1, ICE, and Sakigake, is calculated. The trajectory calculation suggests that observations carried out far from Halley's comet are inconsistent with low outflow velocity.

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