Interacting galaxies NGC 4485 and NGC 4490 sketched by Alan Goldstein using a 10-inch f/5 reflector at 40x.
To learn more about astronomical sketching, Astronomy magazine subscribers can access my Astronomy.com video "Sketching from the telescope" and read Glenn Chaple's Observing Basics column "Sketching 101."
See the rest of the Sketching at the telescope series.