Exposure data
Telescope: 4.5″ Newton f=440mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L: 24x3min R: 4x3min G: 4x3min B: 4x3min
Exposure time total: 1h 48min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2012-07-22+23
Object data of M 25
Object type: Open star cluster (I 2 p)
Size: 32′
Magnitude: 4.6 mag
Constellation: Sagittarius
Distance: 2100 Ly