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Dark Horse Observatory - Image Details: NGC 6939
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Image Details: NGC 6939

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NGC 6939

Object/Name: NGC 6939 (OCL 217) Image Details:
Type: Open Cluster - (Trumpler Class I 1 m) Luminance IRB:10.00 min. (18) – 180.00 min. 1x1
Constellation: Cepheus Red:10.00 min. (8) – 80.00 min. 1x1
RA: 20 hours 31.5 minutes Green:10.00 min. (7) – 70.00 min. 1x1
Dec: +60 degreees 39 minutes Blue:10.00 min. (8) – 80.00 min. 1x1
Distance: 5,868.0 light years Total Time:410 minutes
Magnitude: 7.8 mag   
Size: 10.0 x 10.0 arc minutes   
Imaging Dates: 14 August - 13 October 2007   
Location: Dark Horse Observatory, Kimberton, PA 19460 U.S.A.   
Equipment:
Telescope: Takahashi BRC-250 Mount: Mountain Instruments MI-250
CCD: SBIG ST-10XME Rotator: Optec Pxyis Rotator
Focuser: Finger Lakes Instruments DF2 Filters: Astrodon Series E
Software Used:
  CCDStack MiraPro Professional
Photoshop CS2 Russel Croman’s Gradient Xterminator
Noel Carboni’s Astronomy Tools  
Detailed Information:
NGC 6939 is a small, faint open cluster in the constellation, Cepheus, visually near NGC 6946. It is much closer than the galaxy NGC 6946, but it makes a nice composition in a wide visual field. Very few of the almost 80 stars can be seen in small aperture telescopes, but this image captures more of them. A panorama can be seen below.

Click on the image to see full size panorama (Caution - images can be quite large)



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