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The Crescent Nebula NGC 6888 H-Alpha, OIII and SII "Hubble Palette", Terry Hancock

The Crescent Nebula NGC 6888 H-Alpha, OIII and SII "Hubble Palette"

The Crescent Nebula NGC 6888 H-Alpha, OIII and SII "Hubble Palette", Terry Hancock

The Crescent Nebula NGC 6888 H-Alpha, OIII and SII "Hubble Palette"

Description

Filters were asigned with OIII as the blue channel, H-Alpha as the green channel and SII as the red channel. H-Alpha was shot un binned, OIII and SII were shot binned 2x2.

Total Exposure time 30 hours

Thanks For Looking

All the Best & Clear Skies

Terry

Down Under Observatory

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Image Information

Location: DownUnder Observatory, Fremont MI

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

Exposures:

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 www.astrofactors.com

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

Comments

Histogram

The Crescent Nebula NGC 6888 H-Alpha, OIII and SII "Hubble Palette", Terry Hancock