Exposure data
Telescopep: Vixen R200SS f=800mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L: 12x5min R: 2x5min G: 2x5min B: 2x5min
Exposure time total: 1h 30min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2005-07-04
Object data of M 20
Object type: Emission and reflection nebula
Size: 28′
Magnitude: 6.3 mag
Constellation: Sagittarius
Distance: 5200 Ly
