Model fits of radiance distribution along the jet axis (orange and blue lines) with the data (red and black dots) for the first two (UV-375 nm) difference images. Fit parameters are the size distribution exponent, the dust production rate, and the start time of the outburst. The best fit shown was achieved for an exponent of g = 2.6 and a start time of t = −75 s (zero time defined as start of exposure of first image).