Distance 825 ly, Visual Brightness 4.6 mag , Apparent Dimension 32.0 arc min
Right Ascension 21 : 32.2 (h:m) ; Declination +48 : 26 (deg:m)
Discovered by Charles Messier in 1764.

M39 is a very large but very loose open cluster, situated some 9 degrees east and a bit north of Deneb (Alpha Cygni).
It is of intermediate age (estimates between 230 and 300 million years). 30 stars are proven members and contained in a volume of about 7 light years diameter.
[Quoted from SEDS]

LRGB 70 10 10 10 (5 min subs), 5 darks no flats
guided, captured and calibrated with MaximDL 5.09; Curves, Levels, Color Balance, Noise Reduction in ACDSee Pro5

FLI ML8300 at -25°C ; ambient temp: +16°C, humidity: 55%, SQM: 19.66 mag/arcsec2
FLI CFW-2-7 Filter Wheel + Baader 50mm Filter Set
Guiding: MonsterMOAG + SXV-H9C
Takahashi FSQ106ED f/5
Astro-Physics AP1200GTO

cropped to 3x2 aspect ratio