Bulletin of Taras Shevchenko National University of Kyiv. Astronomy, no. 58, p. 41-44 (2018)

Аbsolute brightness of the set of long-periodical comets 1990–2015

А. Guliev, Sr. Sci., Prof.
U. Poladova, Dr. Sci.

Astronomical Observatory of Taras Shevchenko National University of Kyiv, Kyiv


The values of the photometric parameter H10 for 69 long-period comets, observed in the period of 1990–2005 on the Vsekhsviatsky scale are calculated. The values of the parameters Hy and y from the Orlov equation for 56 of them are determined also. The intervals of heliocentric and geocentric distances corresponding to the observations of such comets are relatively longer. Calculations prove that the parameter H10, entered by Vsekhsviatsky, still remains relevant for the predicting of the observed brightness of the comets and comparing various of cometary groups according to their average brightness. A total 6391 visual estimates from different sources were used in the calculating.

Key words
Comets, cometary groups

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DOI: https://doi.org/10.17721/BTSNUA.2018.58.41-44