Exposure data
Telescopes: 12" Meade ACF f=1500mm + Vixen VC200L (8" Cassegrain f=1260mm)
Reducer: Lumicon GEG
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L:20x5+16x4min R:4x5min+3x4min G:4x5min+3x4min B:4x5min+3x4min (L:1x1 RGB:2x2)
Exposure time total: 4h 20min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2006-09-22 + 2007-10-14
Object data of NGC 891
Object type: Galaxy (Sb)
Size: 11.2' x 4.3'
Magnitude: 10.1 mag
Constellation: Andromeda
Distance: 30 Mio Ly