Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.1370s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, July 1985, p. 1370-1381.
Astronomy and Astrophysics
Astronomy
16
Comet Nuclei, Precession, Solar Orbits, Coma, Comet Tails, Light Curve, Radii, Comets, Comas Sola, Comet Nuclei, Precession, Models, Comparisons, Axis, Size, Radius, Rotation, Period, Shape, Physical Properties, Astronomy, Motion, Lightcurves, Acceleration, Outgassing
Scientific paper
In a continuing effort to understand the character of the nongravitational acceleration in the motions of comets and the underlying effects of directed outgassing on the stability of the rotation axis, the nucleus properties of periodic comet Comas Solá are studied on the basis of a precession model previously applied by Whipple and Sekanina to P/Encke and by Sekanina to P/Kopff and P/Giacobini-Zinner. The derived equatorial radius of P/Comas Solá's nucleus is close to 1 km and its rotation period is in the range between 1.5 and 2.3 days, according to the model. The calculated shape of the comet's nucleus is compared with those of the other comets studied by this technique and with the figure of the nucleus of comet 1983 VII determined by Goldstein, Jurgens, and Sekanina from spectra of the returned radar signal. Possible evolutionary paths for precessional behavior of comets are briefly discussed.
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