Exposure data
Telescope: 12″ Meade ACF f=1500mm with Reducer Lumicon Giant Easy Guider
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L: 20x2min R: 10x2min G: 10x2min B: 10x2min
Exposure time total: 1h 40min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2010-08-21
Object data of NGC 7789
Object type: Open star cluster (II 1 r)
Size: 15′
Magnitude: 6.7 mag
Constellation: Cassiopeia
Distance: 7600 Ly
