Object: Open cluster NGC 6755 Constell: AQL RA: 19h 07.8m Decl: +04° 14' Epoch: 2000 Mag: 7.5m Size: 14' Type: III 2 r Observer: Jere Kahanpää Obs. place: Helsinki, Finland Date/Time: 15./16.9.1996, 22.50 Telescope: C 200/2000 Magn: 160x Filter: Field: 19' NE Lim.mag: 5.4m Background sky: 4 Seeing: 3-4 Weather: +7 °C, no Moon. Brightness: 4 Alt: Description: At 80x the field includes only one obvious object: a small nebulous knot of stars. At 160x the knot is about diam. 1,5'x1' and includes 3 mag. 13 stars and a few fainter ones. The glow is still visible but very faint. The knot is surrounded by a slight concentration of stars mag. 11... Total about 15-20 *. Diam. 5'. When I observed this object I knew there should be two clusters in the field: NGC 6755 and CZ 39. The only object in the field besides the knot at 80x is a large but very sparse group of stars where NGC 6755 should be. Comparing the drawing with POSS I confirms this object to be NGC 6755 (the central parts) and the knot is a small group of stars within it. CZ 39 is outside the field of view.