Object: Open cluster NGC 1664 Constell: AUR RA: 04h 51.1m Decl: +43° 42' Epoch: 2000 Mag: 7.6m Size: 18' Type: III 1 p Observer: Jere Kahanpää Obs. place: Jyväskylä, Finland Date/Time: 25./26.2.1992, 21.00 Telescope: N 205/1000 Magn: 63x Filter: Field: 60' NE Lim.mag: 5.5m Background sky: 3 Seeing: 4 Weather: Brightness: 3 Alt: Description: Not very obvious but still easy. A cluster of about 30 stars NW of a mag. 7 star. Most stars are of 11th magnitude and a very few a brighter or much fainter.