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I make a rough sketch at the eyepiece. That would take 5 minutes or so, then usually on the following day I'll make the full drawing. It's pencil on white paper then inverted using an image processing package.
I've been sketching deep-sky objects for over 40 years. In fact, I've sketched just about every DSO I've ever seen, apart from open clusters. I just write descriptions of those, usually. The same techniques apply to comets. I've only made a dozen or so observations of comets though, as opposed to something over 1300 DSOs.
Last edited by DeepSkyBagger; 21-08-2017 at 06:03 AM.
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