NEOWISE 4 › Forums › Comets › spectroscopic cross section through C/2020 R4 ATLAS › NEOWISE 4 17 May 2021 at 1:01 am #584227 Derek RobsonParticipant Hi Robin Just looked again at the widest angle image. At the bottom, there are a few lamps which show the dispersion is roughly horizontal (on that image anyway). Derek
