Post-perihelion photometry of Comet Liller (1988a) at Catania (Italy) Observatory

Details Post-perihelion photometry of Comet Liller (1988a) at Catania (Italy) Observatory Post-perihelion photometry of Comet Liller (1988a) at Catania (Italy) Observatory

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...219..322b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 219, no. 1-2, July 1989, p. 322-325.

Astronomy and Astrophysics

Astronomy

6

Astronomical Photometry, Comets, Perihelions, Ultraviolet Spectra, Visible Spectrum, Comets, Liller, Photometry, Earth-Based Observations, Production Rates, Gases, Density, Calculations, Distance, C2 Radical, C3 Radical, Cyanogen, Comet Nuclei, Organic Material, Crust, Astronomy, Cn Radical

Scientific paper

Photometric observations of Comet Liller (1988a), obtained after its passage at perihelion, are presented. The standard filters of the International Halley Watch (IHW): C2, BC, C3, CN, and UC have been used. Gas production rates have been derived. These are found to vary as r exp-n (r being the comet-sun distance) with n = 3.45 (C2), 2.73 (C3), and 3.21 (CN). Production rates of solids follow the same law as gas with n = 2.62. The observations are not incompatible with a nucleus whose sublimation is regulated by an external organic crust.

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