Morphology of the nucleus of Comet P/Halley

Details Morphology of the nucleus of Comet P/Halley Morphology of the nucleus of Comet P/Halley

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...248..656s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 248, no. 2, Aug. 1991, p. 656-668. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

14

Comet Nuclei, Halley'S Comet, Photomapping, Relief Maps, Shapes, Topography, Coordinates, Giotto Mission, Terminator Lines, Three Dimensional Models, Vega Project

Scientific paper

The nucleus of Comet P/Halley has been modeled using techniques developed for mapping non-spherical bodies. The rotation assumptions of Sagdeev et al. (1986) were used to estimate sub-spacecraft and sub-solar latitudes and longitudes for Vega and Giotto images. An initial triaxial ellipsoid model of the nucleus was altered by changing radii locally until the limbs and terminators of most images could be reproduced. The shape thus defined is illustrated cartographically, demonstrating techniques which may be applied to many other small bodies in future. The inability of the model to successfully reproduce all features of the images indicates that the rotation state is still not fully understood.

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