Rotational period of comet Halley

Details Rotational period of comet Halley Rotational period of comet Halley

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.324..646m&link_type=abstract

Nature (ISSN 0028-0836), vol. 324, Dec. 25, 1986, p. 646-649.

Astronomy and Astrophysics

Astronomy

139

Angular Velocity, Emission Spectra, Halley'S Comet, Rotation, Astronomical Photometry, Carbon, Cn Emission, Giotto Mission, Hydroxyl Emission, Periodic Variations

Scientific paper

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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