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2060 Chiron back to a minimum of brightness |
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| Authors: | Daniela Lazzaro Marcos A Florczak Alberto Betzler Othon C Winter Silvia M Giuliatti-Winter Claudia A Angeli Dietmar W Foryta |
| Institution: | a Observatório Nacional, Dep. Astrofísica, 20921, Rio de Janeiro, Brazil b CEFET, Dep. Física, 80000, Curitiba, Brazil c Universidade Federal do Rio de Janeiro, Obs. Valongo, Rio de Janeiro, Brazil d UNESP, Grupo de Dinâmica Orbital e Planetologia, Guaratinguetá, Brazil e Observatoire de Paris, EUROPA, 92195, Meudon Principal Cedex, France f Universidade Federal do Paraná, Dep. Física, 80000, Curitiba, Brazil |
| Abstract: | 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. |
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