Exposure data
Telescope: 12″ Meade ACF f=3050mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L: 40x2min R: 10x2min G: 10x2min B: 10x2min (L: 1×1 RGB: 2×2)
Exposure time total: 2h 20min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2008-05-09
Object data of M 57
Object type: Planetary nebula
Size: 1.2′
Magnitude: 9.7 mag
Constellation: Lyra
Distance: 2300 Ly
