Rotation states of the nucleus of Comet Halley compatible with spacecraft images

Details Rotation states of the nucleus of Comet Halley compatible with spacecraft images Rotation states of the nucleus of Comet Halley compatible with spacecraft images

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...86...21a&link_type=abstract

Icarus (ISSN 0019-1035), vol. 86, July 1990, p. 21-29.

Computer Science

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Comet Nuclei, Giotto Mission, Halley'S Comet, Satellite Imagery, Vega Project, Angular Momentum, Oscillations, Rotation, Comets, Halley, Rotation, Comet Nuclei, Spacecraft Observations, Axes, Imagery, Vega Missions, Giotto Mission, Period, Oscillations, Motion, Diagrams, Features, Periodicity

Scientific paper

The positions of the nucleus of Comet Halley have been interpreted, for the observations conducted by the flybys of Vegas 1 and 2 and Giotto, with a pure rotation motion and a period of about 54 hours. Comparisons with ground-based estimates of either the angular momentum or the instantaneous rotation axis of the nucleus indicate that the observed rotation axis during the three spacecraft encounters was moving; on this basis it is suggested that the rotation rate of the nucleus cannot be simple, for all that it may not be far from a pure rotation.

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