Iiro's DeepSky Sketches

Name: NGC 7789Other name: OCL 269
RA: 23h 57.4m DEC: +56° 43'
Constellation: CAS
Type: Open cluster
Magnitude: 6.7
Size: 16'
Number of stars: 300
Brightest star: 10.7
Classification: II 1 r
Description: Cl,vL,vRi,vmC,st 11...18
Notes: H VI 30,1000 members from 11 to 18 mag
Observer: Iiro Sairanen
Location: Ania, Pirkkala, Finland
Date: 23/24.9.2009 22:45
Instrument: Newton 300/1500 mm
Magnification: 115xFilter: -
Field: 35'Seeing: 4
Background sky: 3NE lim mag: 6.5
Visuality: IHeight: 67°
Weather: +7°C
Description: A superb open cluster Cassiopeia! There is a huge number of 11-15 mag stars visible flavored with a labyrinth of several dark paths that are free from stars. It's impossible to take up all those stars on the observing sheet.
Updated: 28.10.2009 22:26