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The Crescent Nebula NGC 6888 CFHT Palette | by Terry Hancock
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The Crescent Nebula NGC 6888 CFHT Palette

Here is another narrowband version of the Crescent, this time using the Canada France Hawaii Telescope palette (CFHT Palette) technique, the colors are assigned with Ha = Red, OIII = Green, SII = Blue


Total Exposure time 30 hours


Thanks for looking and clear skies


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Image Information

Location: DownUnder Observatory, Fremont MI

Date of Shoot 22nd, 23rd, 25th July, 26th through to 8th Aug 2012


OIII 28 x 30 mins binned 2x2

SII 24 x 30 mins binned 2x2

HA 8 x 30 mins unbinned

Camera: QHY9M monochrome CCD, cooled to -30C

StarlightXpress Color Filter Wheel

Scope: Astronomy Technologies Astro-Tech 12" f/8 Ritchey-Chrétien astrograph

Autoguided using StarlightXpress Lodestar autoguider, StarlightXpress Ultra Slim Off Axis guider

Paramount GT-1100S German Equatorial Mount (with MKS 4000)

Image Aquisition software Maxim DL5

Stacking software CCDStack

Post Processing Photoshop CS5

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Taken on August 11, 2012