Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990baicz..41....1k&link_type=abstract
Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 41, no. 1, Jan. 1990, p. 1-17.
Astronomy and Astrophysics
Astronomy
5
Comets, Light Curve, Magnitude, Statistical Analysis, Astronomical Catalogs, Data Bases, Error Analysis, Periodic Variations, Comets, Periodic Comets, Absolute Magnitude, Brightness, Parameters, Statistical Analysis, Astronomy, Lightcurve, Optical Properties, Evolution, Catalog, Symmetry, Photometry, Distance, Analysis, Geometry
Scientific paper
This paper presents a statistical analysis of the list of absolute magnitudes of 144 periodic comets including their 575 apparitions, 1770 to 1987, with 240 missed returns in between (Kresak and Kresakova, 1989). The adopted corrections for instrumental effects, which are essential for the evaluation of the real brightness variations, are checked using four different parameters. The application of these corrections reduced the magnitude dispersion by 60 percent and the mean fading rate by 90 percent. There is no systematic prevalence of preperihelion or postperihelion brightness peaks, but some comets exhibit a recurrent light-curve asymmetry - in particular P/D'Arrest and P/Encke.
Kresak Lubor
Kresakova M.
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