Color Variations in NGC7000

(Third of three CCD test images)

Emission Nebula in Cygnus

Uploaded 9/22/06

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This image is another short exposure set, taken to test out the SV80s with the ST10XME CCD camera. This is a pure RGB image, with no extra hydrogen alpha data added. Despite this, the results show some promise, and even with these unacceptably trailed stars from flexure (when I tried to use the main instrument as a guider), the results seem compelling.

Look carefully at the color variations across the face of the nebula. When maintaining a precise G2V color balance on nebula, I often see subtle colors not easily seen otherwise. Here, notice the set of pink areas just above the "Gulf of Mexico" region, and just above that one at the top of the frame. Such intricate hues were never recorded by me with my film shots, even with deep Schmidt Camera images. Also note the plethora of yellow stars in this image. This is caused by extensive interstellar dust in this part of the Galaxy.

I now think the setup has been more or less wrung out, and is ready for some deep, dark skies imaging. The next step is to move the refractor to its own permanent observatory up in the ultra dark, world class skies at Happy Jack.

Instrument: Stellarvue SV80s Platform: Astrophysics 1200 QMD CCD Camera: SBIG 10XME NABG with Enhanced Water Cooling Guider: SBIG ST4 Exposure: RGB = 10:10:10 RGB Combine Ratio: 1: 1.05: 1.11 Filters: AstroDon RGB Tricolor Location: Payson, Arizona Elevation: 5150 ft. Sky: Seeing FWHM = 5 arcsec (Maxim DL - 10min subframe), Transparency 9/10 Outside Temperature: 45 F CCD Temperature: -20 C Processing Tools: Maxim DL, Gralaks Sigma, Photoshop, PixInsight, Starizona Debloomer. HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS GLOBULARS OPEN CLUST PLANETARIES LINKS


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