Object: Galaxy NGC 4102 Constell: UMA RA: 12h 06.4m Decl: +52° 43' Epoch: 2000 Mag: 12.0m (b) Size: 3.0x'1.7' Type: SAB(s)b? Observer: Jere Kahanpää Obs. place: Hartola, Finland Date/Time: 5./6.1.1997, 01.35 Telescope: N 205/1000 Magn: 133x Filter: Field: 22' NE Lim.mag: 6.2m Background sky: 2 Seeing: 2 Weather: -18 °C, no Moon. Brightness: 3 Alt: 60° Description: Almost round. PA 45°. Size 1.5'x1.3'. Quite strongly concentrated with a non-stellar core.