Hemisphere:  Northern  ·  Contains:  IC 1296  ·  M 57  ·  NGC 6720  ·  Ring Nebula
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Messier 57, 



    
        

            Alf Jacob Nilsen
Messier 57
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Technical card

Imaging telescopes or lenses: GSO RC 254/2000 Carbon OTA

Imaging cameras: ZWO ASI1600 Pro

Mounts: iOptron CEM60-EC

Guiding telescopes or lenses: Skywatcher EvoGuide 50ED

Guiding cameras: Starlight Xpress Lodestar 2

Software: Astro Pixel Processor APP  ·  Adobe Photoshop CC

Filters: Baader 36mm Ha 7nm  ·  Baader 36mm R  ·  Baader 36mm L  ·  Baader 36mm G  ·  Baader 36mm B

Accessory: Optec TCF-S


Dates:Oct. 11, 2020Oct. 13, 2020

Frames:
Baader 36mm B: 10x180" (gain: 0.00) -20C bin 2x2
Baader 36mm B: 10x180" (gain: 139.00) -20C bin 2x2
Baader 36mm G: 10x180" (gain: 0.00) -20C bin 2x2
Baader 36mm G: 10x180" (gain: 139.00) -20C bin 2x2
Baader 36mm Ha 7nm: 10x180" (gain: 0.00) -20C bin 1x1
Baader 36mm Ha 7nm: 10x300" (gain: 139.00) -21C bin 1x1
Baader 36mm L: 30x58" (gain: 0.00) -20C bin 1x1
Baader 36mm L: 30x60" (gain: 139.00) -20C bin 1x1
Baader 36mm R: 10x180" (gain: 0.00) -20C bin 2x2
Baader 36mm R: 10x180" (gain: 139.00) -20C bin 2x2

Integration: 5.3 hours

Flats: ~25

Avg. Moon age: 24.67 days

Avg. Moon phase: 25.06%


Basic astrometry details

Astrometry.net job: 3966581

RA center: 18h 53' 31"

DEC center: +33° 0' 43"

Pixel scale: 0.738 arcsec/pixel

Orientation: 334.367 degrees

Field radius: 0.224 degrees


Resolution: 1492x1604

Locations: Osmundstø Observatorium (private backyard observatory), Hidrasund, Vest Agder, Norway

Data source: Backyard

Description

I struggled with processing this image of M57. Using 180 and 60 secs subs, the nebula got overexposed (but not burned out) and I have not been able to strech the nebula without killing most of the background data. Tips and tricks on how to process an image like this will be most welcome. Next time I'll try with shorter subs. anyway...enjoy...

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Author

ajnilsen
Alf Jacob Nilsen
License: None (All rights reserved)
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Messier 57, 



    
        

            Alf Jacob Nilsen