Object: Open cluster DO 13                      Constell: CAS

RA: 00h 50.0m           Decl: +64° 08'          Epoch: 2000
Mag: 8m (own)           Size: 12'               Type: III 1 p

Observer: Jere Kahanpää
Obs. place: Hartola, Finland
Date/Time: 24./25.8.1996, 00.27

Telescope: N 205/1000
Magn: 80x               Filter:
Field: 37'              NE Lim.mag: 5.8m
Background sky: 3-4     Seeing: 2 
Weather: +9 °C, 2/3 low SW.        

Brightness: 2           Alt: 65°
Description: A easy cluster. The Trumpler class fits well:
Detached but not concentrated. Diameter 14'. About 30 stars mag.
11...12, most being 11m. 15' SW from a 6th magnitude star.
Irregular.