Object: Openc cluster MESSIER 23 Constell: SGR RA: 17h 56.9m Decl: -19° 01' Epoch: 2000 Mag: 5.5m Size: 27' Type: II 2 r Observer: Jere Kahanpä Obs. place: Öland, Sweden Date/Time: 6./7.8.1992, 01.00 Telescope: N 205/1000 Magn: 63x Filter: Field: 60' NE Lim.mag: 5.8m Background sky: 2 Seeing: 3 Weather: Brightness: 3 Alt: Description: A very beautiful open cluster. Many stars of 11 magn.