Dust distribution of Comet Halley from the Giotto radio science experiment

Details Dust distribution of Comet Halley from the Giotto radio science experiment Dust distribution of Comet Halley from the Giotto radio science experiment

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250b.215e&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 2: Dust and Nucleus p 215-218 (SEE N

Computer Science

Sound

Atmospheric Sounding, Cometary Atmospheres, Giotto Mission, Halley'S Comet, Radio Astronomy, Satellite Sounding, Cosmic Dust, Doppler Effect, Particle Mass, Velocity Measurement

Scientific paper

Measurements from the Giotto radio science experiment representing the Doppler frequency shift and the intensity level of the X-band downlink signal of the Giotto spacecraft during its encounter with comet Halley are shown. Continuous data reception was maintained throughout the encounter. The Doppler shift measured within a time interval of 100 sec is due to drag effects in the cometary atmosphere causing a deceleration of the spacecraft. The total change of velocity of Giotto is 23.2 cm/sec resulting in a best estimate of 0.32 g for the total cometary mass impacting Giotto during the Halley flyby. A dust jet structure for the inner coma of comet Halley is derived. Several sharply confined dust jets are distinguishable; for the most prominent one, characteristic properties are deduced. Features of this jet structure are shown to correlate with measurements from on-board Giotto experiments and with Earth-based observations.

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