Predictions of occultations of stars and radio sources by Comet Halley

Details Predictions of occultations of stars and radio sources by Comet Halley Predictions of occultations of stars and radio sources by Comet Halley

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984ihwn........72b&link_type=abstract

International Halley Watch Newsletter, Sept. 1, 1984, p. 72-87.

Astronomy and Astrophysics

Astronomy

Astronomical Catalogs, Ephemerides, Gravitational Effects, Halley'S Comet, Radio Sources (Astronomy), Stellar Occultation, Orbital Elements

Scientific paper

Cataloged cometary ephemerides were compared with cataloged star and radio source positions to generate a comprehensive list of expected occultations by Halley's Comet. The comet path was integrated according of Yeoman's orbit no. 12 and account was taken of gravitational and nongravitational perturbations. A coma of 22,500 km was assumed for star occultation and a 675,000 km radius was projected for radio occultations, the latter to allow for effects of an ion tail. The ephemerides were projected back along the comet track and produced a good fit with observed fixes.

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