Comet Halley's Dust Drag Perturbing the Giotto Spacecraft

Details Comet Halley's Dust Drag Perturbing the Giotto Spacecraft Comet Halley's Dust Drag Perturbing the Giotto Spacecraft

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984em%26p...30...31w&link_type=abstract

Earth, Moon and Planets, Volume 30, Issue 1, pp.31-37

Computer Science

6

Comets, Halley, Dust, Perturbations, Giotto Mission, Spacecraft, Mission Planning, Hypervelocity, Impacts, Sputter, Grains, Comae, Drag, Torque, Calculations, Amplitude, Models

Scientific paper

Hypervelocity impact sputter causes impulses substantially greater than the initial momenta of micro-grains of comet Halley's dust coma, the effective factor being discontinuous at the dust mass (0.2 Μg) that just penetrates the spacecraft bumper shield. Marginally non-penetrating grains determine the net drag and torque, calculated here for the Giotto shield and exposed components. The torque due to asymmetries induces a precession of the spacecraft axis, whose amplitude is solved for passage through the model dust coma, to find slowly damped oscillations of significant (1°) amplitude.

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