Exposure data
Telescopes: 12″ Meade ACF f=2100mm with Reducer Lumicon Giant Easy Guider + Vixen VC 200L f=1260mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L: 20x5min + 16x4min R: 4x5min + 3x4min G: 4x5min + 3x4min B: 4x5min + 3x4min (L: 1×1 RGB: 2×2)
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
