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Contains:  IC 1296, M 57, NGC 6720, Ring nebula in Lyra
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M57: Strange LRGB + NB Mashup, 



    
        

            Ken Sturrock
M57: Strange LRGB + NB Mashup
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M57: Strange LRGB + NB Mashup

Technical card


Dates:July 29, 2017

Frames: 144x240" bin 0x0

Integration: 9.6 hours

Avg. Moon age: 6.33 days

Avg. Moon phase: 38.92%


Basic astrometry details

Astrometry.net job: 1671874

RA center: 18h 53' 35"

DEC center: +33° 1' 48"

Pixel scale: 1.306 arcsec/pixel

Orientation: 268.038 degrees

Field radius: 0.663 degrees


Resolution: 2836x2305

Description

Although I like the color saturated stars, I'm not really thrilled with this image. It was assembled from a grab bag of poorly-planned subframes in LRGB plus Ha, O-III, S-II and Near IR. The image only uses about 9.6 hours worth of exposure but I had a lot of trouble controlling the brightness of the nebula - despite several rounds of HDR Multiscale Transform. I even resorted to using curves in an attempt to back-down the blow-out by selectively reducing brightness.

Comments

Author

ken_sturrock
Ken Sturrock
License: Attribution-NonCommercial Creative Commons
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M57: Strange LRGB + NB Mashup, 



    
        

            Ken Sturrock