NGC 6888 (The Crescent Nebula in Cygnus)

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Date: June, 2008
Location: Elizabeth, CO. ~6500 ft., Mag 5 skies
Telescope: 16" f/4.9 Newtonian, Pegasus Optics primary
Mount: Mathis Instruments MI-500
Exposure: 168 mins (2.8 hrs) luminance ST-10XME, 60 mins RGB ST-2000XCM
Correctors, filters, etc.: 3" Keller/Wynne coma corrector on ST-10 and XCM. Ha filter used on each ST-10 sub, Custom Scientific luminance filter on each XCM sub. Normal self-guiding
Seeing: ~2"

Twenty-one ST-10 subs, each 8 mins long, median combined in sets of three in Maxim. Medians summed in Maxim. 75 iterate PC deconvolution/DDP/sharpening in CCDStack

Six XCM subs, each 10 mins long, calibrated in CCDOps, color converted, median combined, medians summed in Maxim. DDP in Maxim used to create colorizing image from sum. Color/luminance images registered in Registar. Final LRGB assembled in Corel's PhotoPaint 12 using LAB

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