Thanks for the link, DustyDevil; very interesting paper, but it was looking at the revolution of the nucleus of the comet, if I got it right, and not any visible spiraling of the orbital trajectory of the center of the mass that I was alluding to. I have another paper somewhere,investigating the sheath arrangement around a cometary nucleus, but it wasn't about trajectories, either.
The use of the abbreviation "CN" was annoying. It was never formally defined, but it appeared at first to refer to "Cometary Nucleus", the item under study through observations from the ejecta in the coma The first thing that sprang to [my] mind was "cyanogen" or (CN)2, a common molecule in space as well as being able to be manufactured here for a variety of purposes. But cyanogen is a pair
of C-N's with the two carbons back to back in the center with the N's sticking out to the sides. Very confusing. I figured it out from their use of the phrase, "...due to fluorescence emission of the violet (0-0) band", and then looking up cometary filters from Lumicon, a filter manufacturer well known in the amateur astronomy community. Sure enough, very light violet-colored filters enhance the near UV light light emitted by "glowing" cyanogen (see CN emission here
). <- This Hyperphysics article also uses the "CN" convention. Springer articles also use "C2N2", while "ethanedinitrile" and "dicyanogen" are among other names associated with this molecule.
But no mention of "charged body undergoing cyclotron spiraling in a magnetic field"! It was the spiraling of the tails that they were looking at; the "water sprinkler effect", to uses as clues about nucleus rotation and composition.