Exposure data
Telescope: 4.5″ Newton f=440mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times. L: 40x90s + 10x30s R: 6x2min G: 6x2min B: 6x2min
Exposure time total: 1h 41min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2010-06-25
Object data of M 22
Object type: Globular cluster (VII)
Size: 32′
Magnitude: 5.1 mag
Constellation: Sagittarius
Distance: 10400 Ly