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Contains:  Ring nebula in Lyra, M 57, NGC 6720, IC 1296
Getting plate-solving status, please wait...
Ring Nebula HDR w/ Celestron 8SE, 





    
        

            Jeffrey Horne
Ring Nebula HDR w/ Celestron 8SE

Ring Nebula HDR w/ Celestron 8SE

Technical card

Resolution: 3876x2366

Dates:July 24, 2019

Frames:
Orion Skyglow 1.25" Imaging Filter: 96x15" (gain: 180.00) 20C bin 1x1
Orion Skyglow 1.25" Imaging Filter: 94x5" (gain: 180.00) 20C bin 1x1
Orion Skyglow 1.25" Imaging Filter: 92x30" (gain: 180.00) 23C bin 1x1

Integration: 1.3 hours

Darks: ~128

Flats: ~128

Bias: ~128

Avg. Moon age: 21.63 days

Avg. Moon phase: 55.45%

Bortle Dark-Sky Scale: 8.00

Temperature: 16.60

Astrometry.net job: 2838950

RA center: 283.386 degrees

DEC center: 33.033 degrees

Pixel scale: 0.254 arcsec/pixel

Orientation: 269.816 degrees

Field radius: 0.160 degrees

Locations: Backyard - Bortle 8, Nashville, TN, United States

Data source: Backyard

Description

It’s smallness in the sky is one of the reasons this image was a real challenge, as is its brightness.

The M57 is pretty dynamic in brightness, so I took and processed this image as an HDR image; lots of shorter exposures, lots of medium exposures, and lots of long exposures.

I also tried something new...using a planetary camera (tiny chip) for a deep sky object. I fashioned a homemade heat sink and fan cooler for the camera out of an old CPU cooler from a computer, and that kept the camera about 4°C cooler than it otherwise would have reached, but I’m not sure how much it actually helped.

Comments

Author

Jeffreyhorne
Jeffrey Horne
License: Attribution Creative Commons
1390
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Revisions

  • Ring Nebula HDR w/ Celestron 8SE, 





    
        

            Jeffrey Horne
    Original
  • Final
    Ring Nebula HDR w/ Celestron 8SE, 





    
        

            Jeffrey Horne
    B

Sky plot

Sky plot

Histogram

Ring Nebula HDR w/ Celestron 8SE, 





    
        

            Jeffrey Horne