Echelle spectrum

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Robin Leadbeater

There is an absolutely stunning high resolution  echelle spectrum covering 3750-9300A in the BAA database from Joan Guarro Flo taken 20210809.838 using an amateur designed (by Tim Lester) home built remotely operated instrument. (zoom in to view the narrow P Cygni lines from the stellar wind superimposed on the broad nova ejecta lines)  An impressive example of the progress in amateur spectroscopy since the last outburst.