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NGC6357 | by Astroshed
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Emission nebula in Scorpius. Very turbulent in appearance, it is largely luminous hydrogen gas.


This image is a so-called HaRGB image, where an RGB image has been mapped to a Hydrogen-alpha (Ha) luminance image, in order to highlight the hydrogen in the nebula and display the nebula structure more prominantly in a colour image. In a standard RGB image without Ha filtration, the structure in the gas clouds would be far less visible.


Taken on the 1st and 21st October 2010


Exposures: Ha:195 minutes R:45 G:45 B:45 (5.5 hours)


RGB = Red + 30% Ha and Blue+ 3% Ha, with L + 30%Ha


Image planned, acquired, captured and processed from the Gold Coast, using the remote telescope at Southern Galactic in the Macedon Ranges in Victoria.


Telescope: 16"; f8.4 Richey-Chretien

Focal Length: 3414mm

Camera: Apogee Alta U9000

Pixels: 3056 x 3056 x 12um


2011 Malin Awards - Highly Commended

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Taken on May 16, 2011