Object: Open cluster DO 1                       Constell: CYG

RA: 20h 08.2m           Decl: +36° 33'          Epoch: 2000
Mag:                    Size: 5'                Type: IV 2 p n

Observer: Jere Kahanpää
Obs. place: Hartola, Finland 
Date/Time:  20./21.8.1996, 02.20

Telescope: N 205/1000
Magn: 133x              Filter:
Field: 22'              NE Lim.mag: 6.0m
Background sky: 2-3     Seeing: 2 
Weather:  +13 °C, no Moon          

Brightness: 3(-4)       Alt: 55°
Description: A small and inconspicuous cluster. About 20 stars
mag. 11,5...13,5. Most stars are in 3 chains starting from the
brightest one on the NE edge. The chains of stars radiate S-W
from the slightly brighter star and each have 5 or 6 members. A
4th chain of vF stars is faintly visible running W. Own
estimates: Size 5', Tr-type III 1 p, RA 20h 08.4m
                                     Dekl. +36° 34.6' (J2000)