2019-08-29, Spruce Knob, 4800 ft. Clear, relatively calm, humidity moderate. Transparency 10/10 to 6/10. SQM 21.6-21.7. 20" F/4. Abell 52, Aql. Visible in 8 mm, elongated EW 1:2. Visible also with OIII, same appearance, slightly kidney-shaped, convex to N, and E end brighter and thicker. [The nebula is blue and prominent on colorized DSS, round, NE sector brighter.]