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 (Vll)
Size: 32'
Magnitude: 5.1 mag
Constellation: Sagittarius
Distance: 10400 Ly