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2060 Chiron back to a minimum of brightness

1996; Elsevier BV; Volume: 44; Issue: 12 Linguagem: Inglês

10.1016/s0032-0633(96)00111-0

1873-5088

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

Solar and Space Plasma Dynamics

The results of photometric observations of comet/asteroid 2060 Chiron at the Observatório 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, Hv, 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.