Object: Open cluster DO 3                       Constell: CYG

RA: 20h 15.7m           Decl: +36° 47'          Epoch: 2000
Mag: 8m (own)           Size: 15'               Type: III 2 p n

Observer: Jere Kahanpää
Obs. place: Hartola, Finland
Date/Time:  21./22.8.1996, 01.25

Telescope: N 205/1000
Magn: 80x               Filter:
Field: 37'              NE Lim.mag: 5.4m 
Background sky: 2       Seeing: 2 
Weather: Warm. Thin cirrus.

Brightness: 3           Alt: 60°
Description: An inconspicuous triangular cluster pointing towards
N. Estimated Tr-type IV 2 p. About 35 stars mag. 10...13. With
40x the cluster is easily separated from the background but
quite small and faint, maybe slightly nebulous.