Adopting an albedo of 0.04, they derive a radius of 4.5 km. A'Hearn, M. F. et al. Asymmetry decreases with increasing distance from nucleus. Strong color gradient with outer coma very blue. Front fan reddest Fan lag angle is about 23 degrees from solar.
Flow seems collimated.
Dust production roughly constant with heliocentric distance. IUE observations on 24 Oct and 3 to 5 Nov 1980. A'Hearn, M. F. et al. The observed production of OH drops sharply when the cometocentric latitude of the sub-solar point decreases to approx. Kamoun, P. G. et al.