Post-perihelion photometry of Comet Halley at the Skalnate Pleso Observatory

Details Post-perihelion photometry of Comet Halley at the Skalnate Pleso Observatory Post-perihelion photometry of Comet Halley at the Skalnate Pleso Observatory

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991baicz..42...16s&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 42, Feb. 1991, p. 16-21.

Astronomy and Astrophysics

Astronomy

1

Astronomical Photometry, Chemical Composition, Cometary Atmospheres, Halley'S Comet, Carbon, Cn Emission, Magnitude, Perihelions

Scientific paper

The analysis of the postperihelion photoelectric measurements of P/Halley made at the Skalnate Pleso Observatory is presented. The photoelectric measurements of P/Halley in May 1986 were carried out with IHW/IAU filters CN, C2, C3, Cont. 365.0, and Cont. 484.5. The results with the magnitudes, fluxes and the total numbers of molecules at equal heliocentric distance in November 1985, obtained with the same method and instrument, are compared. The contributions of the measured emissions and continua to the total visual brightness are investigated. P/Halley was appreciably brighter on the postperihelion than on the preperihelion arc in all measured spectral regions. The growth in the continuum and in the CN-emission was larger than in the emissions C2 and C3. Before the perihelion, practically, the whole observed brightness of the comet originated in CN- and C2-emissions. After the perihelion the contribution of dust increased significantly. The continuum color in the larger diaphragms was bluer in November 1985 than in May 1986.

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