Broad band filter colours and optical depth of the G and L impact sites of comet shoemaker-levy 9

The crash of Comet Shoemaker-Levy 9 fragments with Jupiter was observed at Aziziah Observatory, Hail, in Saudi Arabia. Three different observational methods (CCD photometric, spectroscopic, and photoelectric photometric) were used. The observations began on July 13 and ended on July 23, 1994. The CCD photometric results of the impact of fragments G and L are presented, showing clearly the dark clouds resulting from those impacts. The measurements of the TiO absorption depth of impacts G and L showed an increase compared to the absorption depth of undisturbed regions, which indicates an increase in the TiO abundance. The increase in the color reddening towards shorter wavelength found in G and L impacts indicate a composition of small sized dust particles. (Author)