Object: Open cluster DO 11 Constell: CYG RA: 20h 26.4m Decl: +41° 27' Epoch: 2000 Mag: Size: 7' Type: IV 3 p n Observer: Jere Kahanpää Obs. place: Helsinki, Finland Date/Time: 14./15.9.1996, 00.10 Telescope: C 200/2000 Magn: 160x Filter: Field: 19' NE Lim.mag: 5.0m Background sky: 4-5 Seeing: 3-4 Weather: +7 °C, no Moon. Brightness: 3 Alt: 65° Description: Suspected with 50x but quite easy with 160x. About 15 stars within 7'. A slight concentration of fainter stars separates the area from the surroudings. While the brightest one is mag. 7 the clustering is visible only when stars fainter than 11m are visible. Drawing the object certainly helped a lot - ar first I didn't see any cluster but decided to draw the field anyway - and there is was!