Here is another way that I recreate a sketch I've made to be viewed on line. I take my notes. draft and final sketch and then combine them in a digital format using GIMP. My favorite way I cannot do, which is to have the lap top out with me in the field which I do frequently, and create the digital sketch as I am observing it.
Here is NGC 6543 which you can see here. Hope it helps and someone can gain something from this format. The process for doing it in the field is basically the same as what I do here, sans the sketch. I often do a live sketch even with the digital sketch. I like having both. I would like comments if something needs to be clarified, re-shot, more details on something etc. Would someone like me to do each of the objects I show, a PN (done) a Globular, a Galaxy (each of the types, sprial, face on, edge on, tilted, and an elliptical (the easiest)? I'll be doing some open cluster work soon also. Anyway, if I don't hear then I won't post anymore of these.
There will be A LOT of little movies here. I tried to upload just 4 segments of about 8 minutes each and Blogger cannot handle that so I am now going to do much shorter segments. Some may say this isn't sketching, some may say it is. That's up to the individual I figure and what they feel conveys the best image of what they have seen. I have had several requests for a tutorial and I hope this shows those who asked how to create a digital sketch in GIMP either based on a live sketch or based on doing it at the eyepiece.
You may need to turn the volume up on each individual movie to hear it and it is faint.