Rotational period of comet Halley

descriptionPublicationkeyboard_double_arrow_right Article 01 Dec 1986 English Publisher:Springer Science and Business Media LLCJournal:Nature, volume 324, pages 646-649 (issn: 0028-0836, eissn: 1476-4687,

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Authors: R. L. Millis; D. G. Schleicher;

doi: 10.1038/324646a0

Rotational period of comet Halley

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Abstract

Results are reported from ground-based photometric measurements of the variations in Comet Halley emissions at different wavelengths in order to calculate the comet rotation rate. The data, gathered at Cerro Tololo, included the OH, NH, CN, C3, CO(+) and C2 bands and continuum emissions at 3650 and 4845 A. Emphasis is placed on the C2 data at 5140 A. Both a periodic variation and a secular decrease was detected through March-April 1986. Light curves generated with the data support a rotational period just short of 7.4 days.

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Lowell Observatory
United States

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