Rho Ophiuchi Cloud Complex (Joey Conenna)

Celestial hemisphere: Southern · Constellation: Scorpius (Sco) · Contains: IC 4601 · IC 4603 · IC 4604 · IC 4605 · M 4 · M 80 · NGC 6093 · NGC 6121 · NGC 6144 · Part of the constellation Scorpius (Sco) · The star 22Sco · The star Al Niyat (σSco) · The star Antares (αSco) · The star οSco · The star ρOph · The star τSco · rho Oph nebula

Rho Ophiuchi Cloud Complex, Joey Conenna

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Rho Ophiuchi Cloud Complex

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Rho Ophiuchi Cloud Complex

Taken while camping at Kissimmee Prairie Preserve state park in FL on 03/13/18 around 4 am. KPP is a class 3 (blue) site, with some of the best skies possible in Florida, USA. It was around 45F / 7C on this morning.

Canon 6D, ISO 1600, 14x60 second exposures, daytime white balance.

Processed raws in Lightroom:

Lens profile correction

CA reduction Purple Hue 5, Green Hue 3

Luminance noise reduction 20

Exposure -0.5

Blacks -40

Saturation +10

export TIFFs

Stacked in DSS with Sigma-Clipping and no background calibration.

Exported TIFF

Photoshop CS6:

Convert 32 to 16 bit

Levels - Adjust black point of separate channels at low end, bringing it up without clipping, then global RGB black point.

Crop image to get rid of stacking artifacts at edges

Gradientxterminator, fine detail, medium aggressiveness

Curves, increase high end

Astronomy Tools - Horizontal / Vertical Banding Noise Reduction

Astronomy Tools - Local Contrast Enhancement

HLVG - Strong

Contrast - +60

Levels - adjust RGB black point again

Vibrance +15, Saturation +30

Levels - Set black point using dropper to darkest part of dark nebula

Curves- bring up brightness again

Astronomy Tools - Deep Space Noise Reduction

Export Tiff & PNG

I am impressed by how much detail I could pull out of this with just 14 frames at 60 seconds.

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Final
C

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Status	Basic success
Started	...
Astrometry.net job	2754033
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