Dust production and coma morphology of 67P/Churyumov-Gerasimenko during the 2002–2003 apparition
Instituto de Astrofísica de Canarias (IAC), C/Vía Láctea s/n, 38205 La Laguna, Tenerife, Spain
Corresponding author: email@example.com
Accepted: 17 June 2003
Light curves and images of 67P/Churyumov-Gerasimenko are presented for the 2002–2003 apparition based on amateur CCD monitoring using a standardised method to produce consistent photometry in Johnson-Kron-Cousins system. Multiaperture data shows a large outburst at perihelion during which dust production increased by a factor of 2 to give a peak value of cm. A similar outburst was seen at the same epoch of the previous apparition in 1995–96 and probably in 1982–83, suggesting that the light curve is similar at succesive returns. A considerable change is seen in the slope of the light curve at AU ( days) corresponding to a second significant increase in dust production. Overall though the dust production shows a very steep dependence with heliocentric distance, falling as r-5.8.
Key words: comets: individual: 67P/Churyumov-Gerasimenko / techniques: photometric
© ESO, 2003