IC434 / Barnard 33 Horsehead Nebula in Halpha and [SII]

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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

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