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The Whirlpool Galaxy M51 LRGB | by Terry Hancock
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The Whirlpool Galaxy M51 LRGB

This is the RGB + Luminance. I have to say this has been one of my toughest projects to process. If conditions allow I will be adding HA to this soon.


Total Exposure time 10 hours and 40 minutes.


Incidentally I am using CCD Stack for the very first time and I am impressed, I might have to go back and reprocess everything now:)

I hope you like the result.


Clear Skies

Terry Hancock


Image details

16 x 10 min each RGB un binned

16 x 10 min Luminance un binned


Location: DownUnder Observatory, Fremont MI

Date of Shoot 12th,13th,18th and 19th April 2012

Camera: QHY9M monochrome CCD

StarlightXpress Color Filter Wheel

Scope: Astronomy Technologies Astro-Tech 10" f/8 Ritchey-Chrétien astrograph

Astro Tech 2" Field Flattener.

Autoguided using QHY5 autoguider, StarlightXpress Ultra Slim Off Axis guider

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

Image Aquisition software Maxim DL5

Registed, Calibrated and Stacked in CCD Stack

Post Processed with Photoshop CS5

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Taken on April 30, 2012