Sodium tail ?

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Robin Leadbeater

Hi Nick,

The sodium emission is so intense in the spectrum that I wonder if there is any sign of a sodium tail like in Hale Bopp?  I hope to take a spectrum of a cross section through the tails if the weather cooperates but a narrow band image though an Na D pass filter could be interesting. Not a common filter among amateurs though I guess. The inverse filter response is more common !