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Ha = Red, [SII] = Green, [SII] + 10% * Ha = Blue
Halpha only
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Taken December 2 - 3, 2005 from my backyard in Castro Valley, California
AP180EDT f/9 imaging scope
FLI IMG6303E imaging camera @ -26C
AP80/900mm guidescope
SBIG ST7E guide camera
FLI CFW7 color filter wheel
6nm FWHM AstroDon Ha 50mm AR-Coated filter
6nm FWHM AstroDon [SII] 50mm AR-Coated filter
5 exposures of 30 minutes through Ha filter
6 exposures of 30 minutes through [SII] filter
5.5 hours total exposure time