Basic object information
Object name: NGC 7789
Object type: Open cluster
Magnitude: 6.7
Size: 25.0' Number of stars: 300
Magnitude of brightest star: 10.7
Object classification: II 1 r
Description: Cl,vL,vRi,vmC,st 11...18
Notes: H VI 30;1000 members from 11 to 18 mag

Catalog information
RA (J2000.0): 23h 57m 24.0s
Dec (J2000.0): +56 43' 00"
Constellation: Cassiopeia

Observer: Iiro Sairanen
Obs. place: Ania, Pirkkala, Finland
Date/Time: 23/24.9.2009 22:45

Telescope: Newton 300/1500 mm

Magn: 115x
Field: 35'
Background sky: 3 (20.9)Visuality: I

Filter: -
NE Lim.mag: 6.5
Seeing: 4
Height: 67

Weather: +7C

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.