2060 Chiron back to a minimum of brightness

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Lazzaro, D.
Florczak, M. A.
Betzler, A.
Winter, O. C.
GiuliattiWinter, S. M.
Angeli, C. A.
Foryta, D. W.

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Elsevier B.V.


The results of photometric observations of comet/steroid 2060 Chiron at the Observatorio do Pico dos Dias (Brazil - OPD) and the Observatoire de Haute-Provence (France - OHP) during 1994 and 1995 are presented. The analysis of the data shows a decrease of 2060. Chiron brightness from its peak values of 1988-1991. The absolute magnitude, H-V, varies from a maximum of 6.6 in February 1994 up to a minimum of 6.8 in June 1995. Therefore 2060 Chiron is back to a minimum of activity close to that of 1983-1985. The slope parameter G is found to be G = 0.71 +/- 0.15. It is suggested that the H-G magnitude system, generally adopted to present 2060 Chiron brightness, is not the most appropriate due to the cometary activity of this object. Copyright (C) 1996 Elsevier B.V. Ltd.



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Planetary and Space Science. Oxford: Pergamon-Elsevier B.V., v. 44, n. 12, p. 1547-1550, 1996.