Focal Pointe Observatory
Astrophotography by Bob Franke

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NGC 7000 - The Cygnus Mountains AKA Cygnus Wall

      Click the full screen zoom button           ^
Click the image to Zoom and Pan              


Click here to view the image without Zoomify (2004 x 1336)  


12.5" RCOS @  ~f/9 (2880 mm fl) 0.643 arcsec / pixel.  Zoomify image scale is 1.28 to 3.33 arcsec / pixel.


Paramount ME


SBIG STL-11000 w/ internal filter wheel, AstroDon 6nm Ha Filter

Acquisition Data

8/26/2009 to 10/16/2009 Chino Valley, AZ... with CCDAutoPilot3 & CCDSoft.


Ha   480 min. (16 x 30 min. bin 1x1)

OIII  480 min. (16 x 30 min. bin 1x1)  

Lum  180 min. ( 6 x 30 min. bin 1x1)

RGB  180 min. ( 4 x 15 min. bin 2x2, each)


Click here for the b/w Ha filtered image.

Click here for a narrowband color mapped version.

Software & Processing Notes

CCDSoft, CCDStack, Photoshop CS w/ the Fits Liberator plugin and Noel Carboni's actions.

PixFix32 (pre-beta) to repair hot/cold pixels and column defects.

CCDStack to calibrate, register, normalize, data reject, combine sub exposures & color combine for the LRGB.

PhotoShop CS3 for non-linear stretching, Ha:OIII color combine and the addition of the LRGB color data.

Processing Notes: 
The LRGB was used for star colors and to enhance the blue areas a bit.  Most of the color comes from the Ha:OIII:OIII mapping to R,G & B.


The image is rotated 130 degrees CCW.

Although taken with narrowband filters, the image is a pretty good representation of RGB colors.  Using narrowband filters greatly enhances the detail.

This image shows the Cygnus Wall, in the southern part of the North American Nebula... NGC 7000. The emission nebula is in the constellation Cygnus, at a distance of about 1600 light years. When shown rotated 130 degrees CCW, the Cygnus Wall becomes the Cygnus Mountains. This area of the Nebula, correlates geographically to southern Mexico. The famous wall, an energized shock front, provides contrast to the adjacent dark "Gulf of Mexico" area, filled with dark gas and dust lanes.

Discovered by William Herschel on October 24th 1786 from Slough England.