Exposure data
Telescopes: 12″ Meade ACF f=1500mm + Vixen VC 200L f=1260mm
Camera: SBIG ST2000XM
Filters: SBIG RGB + Astronomik Hα (13nm)
Exposure times: Hα: 36x5min R: 4x5min G: 4x5min B: 4x5min (L: 1×1 RGB: 2×2)
Exposure time total: 4h
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2007-08-07
Object data of NGC 281
Object type: Emission nebula
Size: 35′ x 30′
Magnitude: 7.3 mag
Constellation: Cassiopeia
Distance: 9500 Ly
