Exposure data
Telescope: 4.5" Newton f=440mm
Camera: SBIG ST2000XM
Filters: SBIG LRGB
Exposure times: L:20x3min R:6x3min G:6x3min B:6x3min
Exposure time total: 1h 24min
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2011-02-05
Object data of M 41
Object type: Open cluster (ll 3 m)
Size: 38'
Magnitude: 4.5 mag
Constellation: Canis Major
Distance: 2300 Ly
Notes: North is left
