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Cocoon Nebula IC5146 LRGB+HA | by Terry Hancock
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Cocoon Nebula IC5146 LRGB+HA

I decided to add some HA (hydrogen alpha) to the Cocoon before moving on. This is 4.5 hours of 15 min sub exposures added to the last LRGB image. Seventeen and a half hours total exposure time.


Terry Hancock


Location: DownUnder Observatory, Fremont MI

Date of Shoot 21st July thru Aug 16th 2011

Camera: QHY9M monochrome CCD

18 x 15 min sub exposures Hydrogen Alpha bin 2x2

27 x 15 min sub exposures Luminance bin 2x2

7x 15 min sub exposures RED bin 2x2

7x 15 min sub exposures GREEN bin 2x2

11x 15 min sub exposures BLUE bin 2x2


Scope: Astro Tech AT10RC F8 Ritchey-Chrétien using AT2FF Field Flattener.

Autoguided using QHY5 autoguider

Guide scope Celestron Short Tube 80mm refractor.

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

Image Aquisition software Maxim DL5

Stacking software Deep sky Stacker

Registered with Registar

Post Processed with Photoshop CS5.

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Taken on August 17, 2011