The variability of Halley's Comet during the Vega, Planet-A, and Giotto encounters

Details The variability of Halley's Comet during the Vega, Planet-A, and Giotto encounters The variability of Halley's Comet during the Vega, Planet-A, and Giotto encounters

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.565s&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 565-567 (SEE N87

Computer Science

15

Halley'S Comet, Space Observations (From Earth), Spectrophotometry, Variability, Emission Spectra, Flyby Missions, Molecular Spectroscopy

Scientific paper

Narrowband photometry of Halley obtained at Cerro Tololo Inter-American Observatory (CTIO), Mauna Kea Observatory (MKO), and Perth Observatory was combined to determine the relative level of activity during the interval spanning the spacecraft encounters. Measurements of the flux from the comet in emission bands of OH, NH, CN, C3, and C2, as well as at 2 continuum points, were obtained at CTIO on each night between 5 March and 17 March 1986. Observations were made on many of these same dates at MKO and Perth using comparable interference filters. The date clearly show variation of a factor of 2.5 in the production of all observed species with a characteristic time scale of a few days.

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