Exposure data
Telescope: 4.5″ Newton f=440mm
Camera: SBIG ST8300M
Filters: Baader LRGB
Exposure times: L: 30x2min R: 10x2min G: 10x2min B: 10x2min
Exposure time total: 2h
Mount: Vixen New Atlux
Location: Erdweg/Germany (500m)
Date: 2010-06-24
Object data of M 39
Object type: Open star cluster (III 2 p)
Size: 32′
Magnitude: 4.6 mag
Constellation: Cygnus
Distance: 825 Ly
