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Contains:  IC 1296, M 57, NGC 6720, Ring nebula in Lyra
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M57 (Ring Nebula), 



    
        

            Joel Shepherd
M57 (Ring Nebula)
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M57 (Ring Nebula)

Technical card


Dates:May 20, 2017May 26, 2017May 27, 2017

Frames:
Baader Planetarium B 1.25": 12x300" bin 1x1
Baader Planetarium G 1.25": 12x300" bin 1x1
Baader Planetarium L 1.25": 24x300" bin 1x1
Baader Planetarium R 1.25": 12x300" bin 1x1

Integration: 5.0 hours

Avg. Moon age: 8.79 days

Avg. Moon phase: 13.23%

Bortle Dark-Sky Scale: 6.00


Basic astrometry details

Astrometry.net job: 1607029

RA center: 18h 53' 35"

DEC center: +33° 1' 40"

Pixel scale: 0.598 arcsec/pixel

Orientation: 176.947 degrees

Field radius: 0.106 degrees


Resolution: 1024x767

Locations: Home, Seattle, WA, United States

Data source: Backyard

Description

Subject: M57: A planetary nebula in the constellation Lyra, located about 2300 light-years from earth. We are looking down a tunnel of gasses being shed by the small white star in the center.

Capture notes: This was a bit of an accidental image. I took the luminance in frustration after spending a couple hours trying to polar align my mount, with limited success. I finally figured guidable was good enough and picked an easy target: M57. Other nights, my primary target was NGC-5907, but when it had moved to a poor position, I'd grab an hour or two of RGB on M57. This may have worked to my benefit because the air had settled by then (one night my RMS error dipped to 0.35"!) and it was as dark as it ever gets here.

Processing notes: It's a bit of a tough target to stretch. There is a barred spiral galaxy below and to the left of M57 that is hard to see. More stretching seemed to wash out the detail in the nebula. In any event, I'm very pleased with the detail: it's worth looking at the large version.

Comments

Author

JoelShepherd
Joel Shepherd
License: Attribution Creative Commons
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M57 (Ring Nebula), 



    
        

            Joel Shepherd

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