Exposure data
Telescope: 12″ Meade ACF f=3050mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB + Astronomik Hα (13nm)
Exposure times: Hα: 10x4min L: 36x4min R: 10x4min G: 10x4min B: 10x4min (L: 1×1 HαRGB: 2×2)
Exposure time total: 5h 4min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2009-08-15+16
Object data of NGC 40
Object type: Planetary nebula
Size: 1.2′ x 1.2′
Magnitude: 12.3 mag
Constellation: Cepheus
Distance: 3500 Ly
