Comet Bradfield (1987 XXIX) sketched by Tom Polakis using a 14-inch f/2.8 reflector at 67x, December 22, 1987, from Riggs Road, Arizona.
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.