One of the highlights that evening was the weird and wonderful planetary nebula NGC 6781 in Aquila. In my 350mm f/4 truss Dob it looks like a uniform, disk shaped glow amidst the stars at first, but at 175x the outer ring quickly becomes very apparent. Strangely the southeast side of the nebula is pretty bright, while the opposite side nearly fades into the background. It kind of resembles the shape of a thin crescent moon with earthshine. Absolutely beautiful!
I made a sketch with graphite pencil on white paper, later inverted with Photoshop. Besides being inverted, it is the original drawing as made behind the eyepiece.