David Swan

Nice spectra, both. It is good to hear Robin that you can subtract the contribution of airglow and light pollution – if only we could all do that for all observation modalities! The comet is rapidly moving out of the worst light pollution for me and is now a) not a problem to locate in binoculars (albeit not impressive visually) b) a good imaging target with an extended coma within reach of my camera. I get a mag of 5, which is very close to Nick’s value (4.9).