Comet Ikeya-Zhang on April 17, 2002. Carbon monoxide shines blue in the tail and diatomic carbon glows green around the head.

12 minutes on gas-hypersensitized Kodak Supra 400 color negative film through a Astro-Physics 155 mm refractor at f7.1 on 2002-04-17 from from Rhodesdale, MD. ©2002